(x-20)+(x+78)=180

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Solution for (x-20)+(x+78)=180 equation:


Simplifying
(x + -20) + (x + 78) = 180

Reorder the terms:
(-20 + x) + (x + 78) = 180

Remove parenthesis around (-20 + x)
-20 + x + (x + 78) = 180

Reorder the terms:
-20 + x + (78 + x) = 180

Remove parenthesis around (78 + x)
-20 + x + 78 + x = 180

Reorder the terms:
-20 + 78 + x + x = 180

Combine like terms: -20 + 78 = 58
58 + x + x = 180

Combine like terms: x + x = 2x
58 + 2x = 180

Solving
58 + 2x = 180

Solving for variable 'x'.

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

Add '-58' to each side of the equation.
58 + -58 + 2x = 180 + -58

Combine like terms: 58 + -58 = 0
0 + 2x = 180 + -58
2x = 180 + -58

Combine like terms: 180 + -58 = 122
2x = 122

Divide each side by '2'.
x = 61

Simplifying
x = 61

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