Solve the system of equations
Sy=-3x + 7
1 x = – 2y – 16

X=
Y=

y=-3x+7

and x=-2y-16

rearrange both to get x and y on one side

So it becomes

y+3x=7

x+2y=-16

if we want to cancel out the y terms first

( depends on your choice, I just chose y)

multiply the top equation by 2, and then subtract  the equations

2y+6x=14

-x+2y=-16

5x=30

x=6

now substitute for find y(choose any equation you want out of the 2)

y+(3*6)=7

y+18=7

y=7-18

y= -11