3-7*(3+6x)=-18

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Solution for 3-7*(3+6x)=-18 equation: 



3-7(3+6x)=-18

We move all terms to the left:

3-7(3+6x)-(-18)=0

We add all the numbers together, and all the variables

-7(6x+3)+3-(-18)=0

We add all the numbers together, and all the variables

-7(6x+3)+21=0

We multiply parentheses

-42x-21+21=0

We add all the numbers together, and all the variables

-42x=0

x=0/-42

x=0

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