4a-80=120

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Solution for 4a-80=120 equation: 



4a-80=120

We move all terms to the left:

4a-80-(120)=0

We add all the numbers together, and all the variables

4a-200=0

We move all terms containing a to the left, all other terms to the right

4a=200

a=200/4

a=50

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