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8=2x+115=4x-19
We move all terms to the left:
8-(2x+115)=0
We get rid of parentheses
-2x-115+8=0
We add all the numbers together, and all the variables
-2x-107=0
We move all terms containing x to the left, all other terms to the right
-2x=107
x=107/-2
x=-53+1/2
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