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j/8+75=81
We move all terms to the left:
j/8+75-(81)=0
We add all the numbers together, and all the variables
j/8-6=0
We multiply all the terms by the denominator
j-6*8=0
We add all the numbers together, and all the variables
j-48=0
We move all terms containing j to the left, all other terms to the right
j=48
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