(x+20)+x=84

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Solution for (x+20)+x=84 equation:


Simplifying
(x + 20) + x = 84

Reorder the terms:
(20 + x) + x = 84

Remove parenthesis around (20 + x)
20 + x + x = 84

Combine like terms: x + x = 2x
20 + 2x = 84

Solving
20 + 2x = 84

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + 2x = 84 + -20

Combine like terms: 20 + -20 = 0
0 + 2x = 84 + -20
2x = 84 + -20

Combine like terms: 84 + -20 = 64
2x = 64

Divide each side by '2'.
x = 32

Simplifying
x = 32

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