18-x=x-12

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Solution for 18-x=x-12 equation: 



18-x=x-12

We move all terms to the left:

18-x-(x-12)=0

We add all the numbers together, and all the variables

-1x-(x-12)+18=0

We get rid of parentheses

-1x-x+12+18=0

We add all the numbers together, and all the variables

-2x+30=0

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

-2x=-30

x=-30/-2

x=+15

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