18=7x+-3

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Solution for 18=7x+-3 equation: 



18=7x+-3

We move all terms to the left:

18-(7x+-3)=0

We add all the numbers together, and all the variables

-(7x-3)+18=0

We get rid of parentheses

-7x+3+18=0

We add all the numbers together, and all the variables

-7x+21=0

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

-7x=-21

x=-21/-7

x=+3

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