x+x+(x+21)=180

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Solution for x+x+(x+21)=180 equation:


Simplifying
x + x + (x + 21) = 180

Reorder the terms:
x + x + (21 + x) = 180

Remove parenthesis around (21 + x)
x + x + 21 + x = 180

Reorder the terms:
21 + x + x + x = 180

Combine like terms: x + x = 2x
21 + 2x + x = 180

Combine like terms: 2x + x = 3x
21 + 3x = 180

Solving
21 + 3x = 180

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 3x = 180 + -21

Combine like terms: 21 + -21 = 0
0 + 3x = 180 + -21
3x = 180 + -21

Combine like terms: 180 + -21 = 159
3x = 159

Divide each side by '3'.
x = 53

Simplifying
x = 53

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