7x-12=9x+18

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Solution for 7x-12=9x+18 equation: 



7x-12=9x+18

We move all terms to the left:

7x-12-(9x+18)=0

We get rid of parentheses

7x-9x-18-12=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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