18=-x+3x+4

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Solution for 18=-x+3x+4 equation: 



18=-x+3x+4

We move all terms to the left:

18-(-x+3x+4)=0

We add all the numbers together, and all the variables

-(2x+4)+18=0

We get rid of parentheses

-2x-4+18=0

We add all the numbers together, and all the variables

-2x+14=0

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

-2x=-14

x=-14/-2

x=+7

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