Question

solve for y
3x+2y+40=x-y

Answer 1

Well, when we solve for y, we want to isolate y by itself, and its coefficient should be positive 1.
So, I will subtract 3x +40 from each side
So we get:
3x +2y + 40 = x -y
3x+2y +40 -3x -40 = x - y - 3x - 40
2y = -2x -y -40
Adding y on each side:
2y + y = -2x -y -40 +y
3y = -2x -40
isolating y, by divinding by 3:
y = (-2x -40) /3

Answer 2

thanks you!