3(1+7a)=-81

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Solution for 3(1+7a)=-81 equation:



3(1+7a)=-81
We move all terms to the left:
3(1+7a)-(-81)=0
We add all the numbers together, and all the variables
3(7a+1)-(-81)=0
We add all the numbers together, and all the variables
3(7a+1)+81=0
We multiply parentheses
21a+3+81=0
We add all the numbers together, and all the variables
21a+84=0
We move all terms containing a to the left, all other terms to the right
21a=-84
a=-84/21
a=-4

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