80+140+a=180

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Solution for 80+140+a=180 equation: 


Simplifying
80 + 140 + a = 180

Combine like terms: 80 + 140 = 220
220 + a = 180

Solving
220 + a = 180

Solving for variable 'a'.

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

Add '-220' to each side of the equation.
220 + -220 + a = 180 + -220

Combine like terms: 220 + -220 = 0
0 + a = 180 + -220
a = 180 + -220

Combine like terms: 180 + -220 = -40
a = -40

Simplifying
a = -40

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