x+40+3x+90=180

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Solution for x+40+3x+90=180 equation:


Simplifying
x + 40 + 3x + 90 = 180

Reorder the terms:
40 + 90 + x + 3x = 180

Combine like terms: 40 + 90 = 130
130 + x + 3x = 180

Combine like terms: x + 3x = 4x
130 + 4x = 180

Solving
130 + 4x = 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 + 4x = 180 + -130

Combine like terms: 130 + -130 = 0
0 + 4x = 180 + -130
4x = 180 + -130

Combine like terms: 180 + -130 = 50
4x = 50

Divide each side by '4'.
x = 12.5

Simplifying
x = 12.5

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