42+56+31+x=180

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Solution for 42+56+31+x=180 equation: 


Simplifying
42 + 56 + 31 + x = 180

Combine like terms: 42 + 56 = 98
98 + 31 + x = 180

Combine like terms: 98 + 31 = 129
129 + x = 180

Solving
129 + x = 180

Solving for variable 'x'.

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

Add '-129' to each side of the equation.
129 + -129 + x = 180 + -129

Combine like terms: 129 + -129 = 0
0 + x = 180 + -129
x = 180 + -129

Combine like terms: 180 + -129 = 51
x = 51

Simplifying
x = 51

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