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3x+4=12x+14
We move all terms to the left:
3x+4-(12x+14)=0
We get rid of parentheses
3x-12x-14+4=0
We add all the numbers together, and all the variables
-9x-10=0
We move all terms containing x to the left, all other terms to the right
-9x=10
x=10/-9
x=-1+1/9
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