Solve this

Question

2x-y=8

5x-3y=21

 

A) solve by elimination

Answer 1

2x-y=8

5x-3y=21

multiply the first equation by -3

-6x+3y=-24

5x-3y=21

add the equations

-x=-3

x=3

substitute into either equation

2*3-y=8

6-y=8

-y=8-6

-y=2

y=-2

(3, -2) is the solution