3(1+2x)=-21

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Solution for 3(1+2x)=-21 equation: 



3(1+2x)=-21

We move all terms to the left:

3(1+2x)-(-21)=0

We add all the numbers together, and all the variables

3(2x+1)-(-21)=0

We add all the numbers together, and all the variables

3(2x+1)+21=0

We multiply parentheses

6x+3+21=0

We add all the numbers together, and all the variables

6x+24=0

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

6x=-24

x=-24/6

x=-4

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