a+45+42=180

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Solution for a+45+42=180 equation: 


Simplifying
a + 45 + 42 = 180

Reorder the terms:
45 + 42 + a = 180

Combine like terms: 45 + 42 = 87
87 + a = 180

Solving
87 + a = 180

Solving for variable 'a'.

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

Add '-87' to each side of the equation.
87 + -87 + a = 180 + -87

Combine like terms: 87 + -87 = 0
0 + a = 180 + -87
a = 180 + -87

Combine like terms: 180 + -87 = 93
a = 93

Simplifying
a = 93

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