3x+15+9x=-57

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Solution for 3x+15+9x=-57 equation: 



3x+15+9x=-57

We move all terms to the left:

3x+15+9x-(-57)=0

We add all the numbers together, and all the variables

12x+72=0

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

12x=-72

x=-72/12

x=-6

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