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-12=7+4x
We move all terms to the left:
-12-(7+4x)=0
We add all the numbers together, and all the variables
-(4x+7)-12=0
We get rid of parentheses
-4x-7-12=0
We add all the numbers together, and all the variables
-4x-19=0
We move all terms containing x to the left, all other terms to the right
-4x=19
x=19/-4
x=-4+3/4
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