(40-4x)+(50-8x)=180

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Solution for (40-4x)+(50-8x)=180 equation: 


Simplifying
(40 + -4x) + (50 + -8x) = 180

Remove parenthesis around (40 + -4x)
40 + -4x + (50 + -8x) = 180

Remove parenthesis around (50 + -8x)
40 + -4x + 50 + -8x = 180

Reorder the terms:
40 + 50 + -4x + -8x = 180

Combine like terms: 40 + 50 = 90
90 + -4x + -8x = 180

Combine like terms: -4x + -8x = -12x
90 + -12x = 180

Solving
90 + -12x = 180

Solving for variable 'x'.

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

Add '-90' to each side of the equation.
90 + -90 + -12x = 180 + -90

Combine like terms: 90 + -90 = 0
0 + -12x = 180 + -90
-12x = 180 + -90

Combine like terms: 180 + -90 = 90
-12x = 90

Divide each side by '-12'.
x = -7.5

Simplifying
x = -7.5

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