6x+3x=-9x-54

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Solution for 6x+3x=-9x-54 equation: 



6x+3x=-9x-54

We move all terms to the left:

6x+3x-(-9x-54)=0

We add all the numbers together, and all the variables

9x-(-9x-54)=0

We get rid of parentheses

9x+9x+54=0

We add all the numbers together, and all the variables

18x+54=0

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

18x=-54

x=-54/18

x=-3

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