18x-7-12x=21-8x

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Solution for 18x-7-12x=21-8x equation: 



18x-7-12x=21-8x

We move all terms to the left:

18x-7-12x-(21-8x)=0

We add all the numbers together, and all the variables

18x-12x-(-8x+21)-7=0

We add all the numbers together, and all the variables

6x-(-8x+21)-7=0

We get rid of parentheses

6x+8x-21-7=0

We add all the numbers together, and all the variables

14x-28=0

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

14x=28

x=28/14

x=2

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