X+(X+12)=100

Solution for X+(X+12)=100 equation:

Simplifying
X + (X + 12) = 100

Reorder the terms:
X + (12 + X) = 100

Remove parenthesis around (12 + X)
X + 12 + X = 100

Reorder the terms:
12 + X + X = 100

Combine like terms: X + X = 2X
12 + 2X = 100

Solving
12 + 2X = 100

Solving for variable 'X'.

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

Add '-12' to each side of the equation.
12 + -12 + 2X = 100 + -12

Combine like terms: 12 + -12 = 0
0 + 2X = 100 + -12
2X = 100 + -12

Combine like terms: 100 + -12 = 88
2X = 88

Divide each side by '2'.
X = 44

Simplifying
X = 44