-4a=-72

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Solution for -4a=-72 equation: 



-4a=-72

We move all terms to the left:

-4a-(-72)=0

We add all the numbers together, and all the variables

-4a+72=0

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

-4a=-72

a=-72/-4

a=+18

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