When Raphael solved the system below by using the method of elimination, he changed the second equation to - 8x-2y=-2 what property justifies this manipulation?

8x+3y=7

4x+y=1

For this case, what we are going to do is use the following property:

Multiply an equation by a scalar.

In this case, the scalar will be:

k = - 2

We have then that equation 2 will be:

k * (4x + y) = k * 1

-2 * (4x + y) = - 2 * 1

-8x-2y = - 2

Answer:

The property that justifies this manipulation is:

Multiply an equation by a scalar.