-5a+7=138

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Solution for -5a+7=138 equation: 



-5a+7=138

We move all terms to the left:

-5a+7-(138)=0

We add all the numbers together, and all the variables

-5a-131=0

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

-5a=131

a=131/-5

a=-26+1/5

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