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310(x+2)=12
We move all terms to the left:
310(x+2)-(12)=0
We multiply parentheses
310x+620-12=0
We add all the numbers together, and all the variables
310x+608=0
We move all terms containing x to the left, all other terms to the right
310x=-608
x=-608/310
x=-1+149/155
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