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4x+54=8x-7
We move all terms to the left:
4x+54-(8x-7)=0
We get rid of parentheses
4x-8x+7+54=0
We add all the numbers together, and all the variables
-4x+61=0
We move all terms containing x to the left, all other terms to the right
-4x=-61
x=-61/-4
x=15+1/4
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