(100-x)+(30-4x)+7x=180

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Solution for (100-x)+(30-4x)+7x=180 equation:


Simplifying
(100 + -1x) + (30 + -4x) + 7x = 180

Remove parenthesis around (100 + -1x)
100 + -1x + (30 + -4x) + 7x = 180

Remove parenthesis around (30 + -4x)
100 + -1x + 30 + -4x + 7x = 180

Reorder the terms:
100 + 30 + -1x + -4x + 7x = 180

Combine like terms: 100 + 30 = 130
130 + -1x + -4x + 7x = 180

Combine like terms: -1x + -4x = -5x
130 + -5x + 7x = 180

Combine like terms: -5x + 7x = 2x
130 + 2x = 180

Solving
130 + 2x = 180

Solving for variable 'x'.

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

Add '-130' to each side of the equation.
130 + -130 + 2x = 180 + -130

Combine like terms: 130 + -130 = 0
0 + 2x = 180 + -130
2x = 180 + -130

Combine like terms: 180 + -130 = 50
2x = 50

Divide each side by '2'.
x = 25

Simplifying
x = 25

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