(x-20)+(2x+20)=90

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Solution for (x-20)+(2x+20)=90 equation:


Simplifying
(x + -20) + (2x + 20) = 90

Reorder the terms:
(-20 + x) + (2x + 20) = 90

Remove parenthesis around (-20 + x)
-20 + x + (2x + 20) = 90

Reorder the terms:
-20 + x + (20 + 2x) = 90

Remove parenthesis around (20 + 2x)
-20 + x + 20 + 2x = 90

Reorder the terms:
-20 + 20 + x + 2x = 90

Combine like terms: -20 + 20 = 0
0 + x + 2x = 90
x + 2x = 90

Combine like terms: x + 2x = 3x
3x = 90

Solving
3x = 90

Solving for variable 'x'.

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

Divide each side by '3'.
x = 30

Simplifying
x = 30

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