20+15=X

Solution for 20+15=X equation:

Simplifying
20 + 15 = X

Combine like terms: 20 + 15 = 35
35 = X

Solving
35 = X

Solving for variable 'X'.

Move all terms containing X to the left, all other terms to the right.

Add '-1X' to each side of the equation.
35 + -1X = X + -1X

Combine like terms: X + -1X = 0
35 + -1X = 0

Add '-35' to each side of the equation.
35 + -35 + -1X = 0 + -35

Combine like terms: 35 + -35 = 0
0 + -1X = 0 + -35
-1X = 0 + -35

Combine like terms: 0 + -35 = -35
-1X = -35

Divide each side by '-1'.
X = 35

Simplifying
X = 35