2a-b+120=180

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Solution for 2a-b+120=180 equation:


Simplifying
2a + -1b + 120 = 180

Reorder the terms:
120 + 2a + -1b = 180

Solving
120 + 2a + -1b = 180

Solving for variable 'a'.

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

Add '-120' to each side of the equation.
120 + 2a + -120 + -1b = 180 + -120

Reorder the terms:
120 + -120 + 2a + -1b = 180 + -120

Combine like terms: 120 + -120 = 0
0 + 2a + -1b = 180 + -120
2a + -1b = 180 + -120

Combine like terms: 180 + -120 = 60
2a + -1b = 60

Add 'b' to each side of the equation.
2a + -1b + b = 60 + b

Combine like terms: -1b + b = 0
2a + 0 = 60 + b
2a = 60 + b

Divide each side by '2'.
a = 30 + 0.5b

Simplifying
a = 30 + 0.5b

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