15x+6x+8-12=-3x+15+21

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Solution for 15x+6x+8-12=-3x+15+21 equation: 



15x+6x+8-12=-3x+15+21

We move all terms to the left:

15x+6x+8-12-(-3x+15+21)=0

We add all the numbers together, and all the variables

15x+6x-(-3x+36)+8-12=0

We add all the numbers together, and all the variables

21x-(-3x+36)-4=0

We get rid of parentheses

21x+3x-36-4=0

We add all the numbers together, and all the variables

24x-40=0

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

24x=40

x=40/24

x=1+2/3

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