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2x+1=4x-13=5x-15
We move all terms to the left:
2x+1-(4x-13)=0
We get rid of parentheses
2x-4x+13+1=0
We add all the numbers together, and all the variables
-2x+14=0
We move all terms containing x to the left, all other terms to the right
-2x=-14
x=-14/-2
x=+7
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