15x+5x-15x+12=-18

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Solution for 15x+5x-15x+12=-18 equation: 



15x+5x-15x+12=-18

We move all terms to the left:

15x+5x-15x+12-(-18)=0

We add all the numbers together, and all the variables

5x+30=0

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

5x=-30

x=-30/5

x=-6

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