# Write a system of equations that has infinitely many solutions

We could try to compute the slopes and compare, but its better if we check if they are parallel directly from the General Form. And of course, we still have our minus 8.

So over here, let's see. There are still only these three possibilities. Zero is always going to be equal to zero. Adding row 2 to row 1: Two variable system of equations with Infinitely many solutions The equations in a two variable system of equations are linear and hence can be thought of as equations of two lines.

This example will also illustrate an interesting idea about systems. The row of 0's only means that one of the original equations was redundant. For example; solve the system of equations below: We solve one of the equations for one of the variables.

Given that such systems exist, it is safe to conclude that Inconsistent systems should exist as well, and they do. But if you could actually solve for a specific x, then you have one solution. So we're in this scenario right over here. But not only do they have the same slope, they are actually the same line, and so the two lines intersect in infinitely many points.

Recall that we still need to do a little work to get the solution. And I get to pick what my blank is. When these planes are parallel to each other, then the system of equations that they form has infinitely many solutions. Bonus In parts acand dthere are infinitely many equations that can be found.

You give me any x, you multiply it by 5 and subtract 8, that's, of course, going to be that same x multiplied by 5 and subtracting 8. In the following example, suppose that each of the matrices was the result of carrying an augmented matrix to reduced row-echelon form by means of a sequence of row operations.

When these two lines are parallel, then the system has infinitely many solutions. So let's go-- let me actually fill this in on the exercise. I'll do it a little bit different. The only difference is the number to the right of the equal sign in the second equation.

The number of variables is always the number of columns to the left of the augmentation bar. We will start out with the two systems of equations that we looked at in the first section that gave the special cases of the solutions.

So, we next need to make the -2 into a 0. Three variable systems of equations with infinitely many solution sets are also called consistent. In the last row of the above augmented matrix, we have ended up with all zeros on both sides of the equations.

When two lines are parallel, their equations can usually be expressed as multiples of each other and that's usually a quick way to spot systems with infinitely many solutions.

And actually let me just not use 5, just to make sure that you don't think it's only for 5. To subtract 2x from both sides, you're going to get-- so subtracting 2x, you're going to get negative 9x is equal to negative 1.

Recall that we still need to do a little work to get the solution. There are still only these three possibilities. These are known as Consistent systems of equations but they are not the only ones. So we will get negative 7x plus 3 is equal to negative 7x.

These are known as Consistent systems of equations but they are not the only ones. A system of equations has infinitely many solutions if there are infinitely many values of x and y that make both equations true.

A system of equations has no solution if there is no pair of an x-value and a y-value that make both equations true. Jan 21,  · I have a take home algebra test and I need to get a % I really need help.

That's all the information the question gave me. Someone please please help me! Thank you so so so much! When there are infinitely many solutions there are more than one way to write the equations that will describe all the solutions. Let’s summarize what we learned in the previous set of examples.

First, if we have a row in which all the entries except for the very last one are zeroes and the last entry is NOT zero then we can stop and the system will have no solution.

See how some equations have one solution, others have no solutions, and still others have infinite solutions. Creating an equation with infinitely many solutions. Practice: Number of solutions to equations challenge.

Next tutorial. Linear equations word problems. This agrees with Theorem B above, which states that a linear system with fewer equations than unknowns, if consistent, has infinitely many solutions. The condition “fewer equations than unknowns” means that the number of rows in the coefficient matrix is less than the number of unknowns. All the systems of equations that we have seen in this section so far have had unique solutions. These are referred to as Consistent Systems of Equations, meaning that for a given system, there exists one solution set for the different variables in the system or infinitely many sets of solution. Write a system of equations that has infinitely many solutions
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