90+31+3x-1=180

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Solution for 90+31+3x-1=180 equation: 


Simplifying
90 + 31 + 3x + -1 = 180

Reorder the terms:
90 + 31 + -1 + 3x = 180

Combine like terms: 90 + 31 = 121
121 + -1 + 3x = 180

Combine like terms: 121 + -1 = 120
120 + 3x = 180

Solving
120 + 3x = 180

Solving for variable 'x'.

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

Add '-120' to each side of the equation.
120 + -120 + 3x = 180 + -120

Combine like terms: 120 + -120 = 0
0 + 3x = 180 + -120
3x = 180 + -120

Combine like terms: 180 + -120 = 60
3x = 60

Divide each side by '3'.
x = 20

Simplifying
x = 20

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