<span>Simplifying
X + 4y = 36
Solving
X + 4y = 36
Solving for variable 'X'.
Move all terms containing X to the left, all other terms to the right.
Add '-4y' to each side of the equation.
X + 4y + -4y = 36 + -4y
Combine like terms: 4y + -4y = 0
X + 0 = 36 + -4y
X = 36 + -4y
Simplifying
X = 36 + -4y</span>