3(7x+1)=-12

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Solution for 3(7x+1)=-12 equation: 



3(7x+1)=-12

We move all terms to the left:

3(7x+1)-(-12)=0

We add all the numbers together, and all the variables

3(7x+1)+12=0

We multiply parentheses

21x+3+12=0

We add all the numbers together, and all the variables

21x+15=0

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

21x=-15

x=-15/21

x=-5/7

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