15x+30-21=-3x-3+12

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Solution for 15x+30-21=-3x-3+12 equation: 



15x+30-21=-3x-3+12

We move all terms to the left:

15x+30-21-(-3x-3+12)=0

We add all the numbers together, and all the variables

15x-(-3x+9)+30-21=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

15x+3x-9+9=0

We add all the numbers together, and all the variables

18x=0

x=0/18

x=0

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