Question

please help me
substitution method
5x-y=12
9x-y=10

Answer 1

alright so here's what you do. Get one of the equations in terms of another. For simplicity's sake we'll solve the first one for y

Answer 2

subtract 5x from both sides so you get -y=-5x+12

Answer 3

divide by -1 on both

Answer 4

y=5x-12

Answer 5

Plug (5x-12) into the second equation for y
\[9x-(5x-12)=10\]

Answer 6

9x-5x+12=10

Answer 7

4x+12=10
4x+12-12=10-12
4x=-2
x=-0.5 or 1/2

Answer 8

replace x in either equation with -0.5 or -1/2

Answer 9

solve for y and you got it.