Question

Question 4. 4. What is the y-coordinate of the solution to the system of equations?

x- y = - 11
y+7 = - 2x

Answer 1

`x-y=-11 \\ \underline{y+7=-2x} \\ x+7=-11-2x \\ x+2x=-11-7 \\ 3x=-18 \ \ \ |/ 3 \\ x=-6 \\ \\ x-y=-11 \\ -6-y=-11 \ \ \ |+6 \\ -y=-5 \ \ \ |* (-1) \\ y=5 \\ \\ (x,y)=(-6,5)`