-126=-15x-3x

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Solution for -126=-15x-3x equation: 



-126=-15x-3x

We move all terms to the left:

-126-(-15x-3x)=0

We add all the numbers together, and all the variables

-(-18x)-126=0

We get rid of parentheses

18x-126=0

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

18x=126

x=126/18

x=7

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