Question

To use the elimination method, you can add the two equations in a system of equations to eliminate one of the variables.

Add the two equations.

{−9x+y=10
{10x-y=-9
What is the resulting equation?

A x = 1

B x= 19

C 19x + 2y = 19

D 2y = 1

Answer 1

Answer:

the answer is A

because: y is eliminated, -9+10=1 and 10-9=1

that's why x=1