Question

Solve the equation by using substituition and get a free medal!
2y+x=4
y-x=-7

Answer 1

please show work

Answer 2

y-x=-7
x=y+7
substituting in other equation
2y+x=4
2y+y+7=4
3y=-3
y=-1
therefore
x=y+7
x=-1+7
x=6

so the solution is x=6,y=-1

Answer 3

you get it?