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8x-3x+87=8x+45
We move all terms to the left:
8x-3x+87-(8x+45)=0
We add all the numbers together, and all the variables
5x-(8x+45)+87=0
We get rid of parentheses
5x-8x-45+87=0
We add all the numbers together, and all the variables
-3x+42=0
We move all terms containing x to the left, all other terms to the right
-3x=-42
x=-42/-3
x=+14
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