138=x+2x+(x+20)

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Solution for 138=x+2x+(x+20) equation:


Simplifying
138 = x + 2x + (x + 20)

Reorder the terms:
138 = x + 2x + (20 + x)

Remove parenthesis around (20 + x)
138 = x + 2x + 20 + x

Reorder the terms:
138 = 20 + x + 2x + x

Combine like terms: x + 2x = 3x
138 = 20 + 3x + x

Combine like terms: 3x + x = 4x
138 = 20 + 4x

Solving
138 = 20 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
138 + -4x = 20 + 4x + -4x

Combine like terms: 4x + -4x = 0
138 + -4x = 20 + 0
138 + -4x = 20

Add '-138' to each side of the equation.
138 + -138 + -4x = 20 + -138

Combine like terms: 138 + -138 = 0
0 + -4x = 20 + -138
-4x = 20 + -138

Combine like terms: 20 + -138 = -118
-4x = -118

Divide each side by '-4'.
x = 29.5

Simplifying
x = 29.5

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