3(4+7x)=-21

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Solution for 3(4+7x)=-21 equation: 



3(4+7x)=-21

We move all terms to the left:

3(4+7x)-(-21)=0

We add all the numbers together, and all the variables

3(7x+4)-(-21)=0

We add all the numbers together, and all the variables

3(7x+4)+21=0

We multiply parentheses

21x+12+21=0

We add all the numbers together, and all the variables

21x+33=0

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

21x=-33

x=-33/21

x=-1+4/7

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