Given the following equation:
x + y + z + 11 = v solve for z:
Start by subtracting x from both sides:
x -x + y + z + 11 = v - x
y + z + 11 = v - x
Subtract y from both sides:
y - y + z + 11 = v - x - y
z + 11 = v - x - y
Subtract 11 from both sides:
z + 11 - 11 = v - x - y - 11
The final answer is:
z = v - x - y - 11