3(a-7)=-78

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Solution for 3(a-7)=-78 equation: 



3(a-7)=-78

We move all terms to the left:

3(a-7)-(-78)=0

We add all the numbers together, and all the variables

3(a-7)+78=0

We multiply parentheses

3a-21+78=0

We add all the numbers together, and all the variables

3a+57=0

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

3a=-57

a=-57/3

a=-19

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