Solve the system of equation using subtraction 3x+2y=7 y=-3y+11

Assumig 2nd euqation is y = - 3x+11

using subtraction

minus y both sides and minus 11

-3x-y=-11

add to other equation to eliminate y's

-3x-1y=-11

3x+2y=7 +

0x+1y=-4

y=-4

sub back

y=-3x+11

-4=-3x+11

minus 11 both sides

-15=3x

divide both sides by 3

-5=x

(x, y)

(-5,-4)