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12x+18=12-7
We move all terms to the left:
12x+18-(12-7)=0
We add all the numbers together, and all the variables
12x+18-5=0
We add all the numbers together, and all the variables
12x+13=0
We move all terms containing x to the left, all other terms to the right
12x=-13
x=-13/12
x=-1+1/12
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