13-4a=-67

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Solution for 13-4a=-67 equation: 



13-4a=-67

We move all terms to the left:

13-4a-(-67)=0

We add all the numbers together, and all the variables

-4a+80=0

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

-4a=-80

a=-80/-4

a=+20

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