10a-80=40

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Solution for 10a-80=40 equation: 



10a-80=40

We move all terms to the left:

10a-80-(40)=0

We add all the numbers together, and all the variables

10a-120=0

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

10a=120

a=120/10

a=12

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