(45-3x)+(45-3x)+(45-3x)=180

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Solution for (45-3x)+(45-3x)+(45-3x)=180 equation: 


Simplifying
(45 + -3x) + (45 + -3x) + (45 + -3x) = 180

Remove parenthesis around (45 + -3x)
45 + -3x + (45 + -3x) + (45 + -3x) = 180

Remove parenthesis around (45 + -3x)
45 + -3x + 45 + -3x + (45 + -3x) = 180

Remove parenthesis around (45 + -3x)
45 + -3x + 45 + -3x + 45 + -3x = 180

Reorder the terms:
45 + 45 + 45 + -3x + -3x + -3x = 180

Combine like terms: 45 + 45 = 90
90 + 45 + -3x + -3x + -3x = 180

Combine like terms: 90 + 45 = 135
135 + -3x + -3x + -3x = 180

Combine like terms: -3x + -3x = -6x
135 + -6x + -3x = 180

Combine like terms: -6x + -3x = -9x
135 + -9x = 180

Solving
135 + -9x = 180

Solving for variable 'x'.

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

Add '-135' to each side of the equation.
135 + -135 + -9x = 180 + -135

Combine like terms: 135 + -135 = 0
0 + -9x = 180 + -135
-9x = 180 + -135

Combine like terms: 180 + -135 = 45
-9x = 45

Divide each side by '-9'.
x = -5

Simplifying
x = -5

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