y + 2x = 5; x = -1
How do I solve for y? What I did was move y to the other side and divide all the values by 2. So, I first got x = 2.5 - y/2.
Substitute - 1 for x
y + 2x = 5
y + -2 = 5
Add 2 to both sides.
y = 7
How do I solve for y? What I did was move y to the other side and divide all the values by 2. So, I first got x = 2.5 - y/2.
y + 2x = 5
y + -2 = 5
Add 2 to both sides.
y = 7