x-15+x-21=180

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Solution for x-15+x-21=180 equation:


Simplifying
x + -15 + x + -21 = 180

Reorder the terms:
-15 + -21 + x + x = 180

Combine like terms: -15 + -21 = -36
-36 + x + x = 180

Combine like terms: x + x = 2x
-36 + 2x = 180

Solving
-36 + 2x = 180

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + 2x = 180 + 36

Combine like terms: -36 + 36 = 0
0 + 2x = 180 + 36
2x = 180 + 36

Combine like terms: 180 + 36 = 216
2x = 216

Divide each side by '2'.
x = 108

Simplifying
x = 108

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