-2(2x+6)=18

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Solution for -2(2x+6)=18 equation: 



-2(2x+6)=18

We move all terms to the left:

-2(2x+6)-(18)=0

We multiply parentheses

-4x-12-18=0

We add all the numbers together, and all the variables

-4x-30=0

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

-4x=30

x=30/-4

x=-7+1/2

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