7x+12=x-3

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Solution for 7x+12=x-3 equation: 



7x+12=x-3

We move all terms to the left:

7x+12-(x-3)=0

We get rid of parentheses

7x-x+3+12=0

We add all the numbers together, and all the variables

6x+15=0

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

6x=-15

x=-15/6

x=-2+1/2

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