3x+x+5x-90=180

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Solution for 3x+x+5x-90=180 equation: 


Simplifying
3x + x + 5x + -90 = 180

Reorder the terms:
-90 + 3x + x + 5x = 180

Combine like terms: 3x + x = 4x
-90 + 4x + 5x = 180

Combine like terms: 4x + 5x = 9x
-90 + 9x = 180

Solving
-90 + 9x = 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 + 9x = 180 + 90

Combine like terms: -90 + 90 = 0
0 + 9x = 180 + 90
9x = 180 + 90

Combine like terms: 180 + 90 = 270
9x = 270

Divide each side by '9'.
x = 30

Simplifying
x = 30

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