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4x+5x-51=81-8x
We move all terms to the left:
4x+5x-51-(81-8x)=0
We add all the numbers together, and all the variables
4x+5x-(-8x+81)-51=0
We add all the numbers together, and all the variables
9x-(-8x+81)-51=0
We get rid of parentheses
9x+8x-81-51=0
We add all the numbers together, and all the variables
17x-132=0
We move all terms containing x to the left, all other terms to the right
17x=132
x=132/17
x=7+13/17
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