90+31+b=180

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Solution for 90+31+b=180 equation: 


Simplifying
90 + 31 + b = 180

Combine like terms: 90 + 31 = 121
121 + b = 180

Solving
121 + b = 180

Solving for variable 'b'.

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

Add '-121' to each side of the equation.
121 + -121 + b = 180 + -121

Combine like terms: 121 + -121 = 0
0 + b = 180 + -121
b = 180 + -121

Combine like terms: 180 + -121 = 59
b = 59

Simplifying
b = 59

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