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-87=14x+2
We move all terms to the left:
-87-(14x+2)=0
We get rid of parentheses
-14x-2-87=0
We add all the numbers together, and all the variables
-14x-89=0
We move all terms containing x to the left, all other terms to the right
-14x=89
x=89/-14
x=-6+5/14
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