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83+3x/4=90
We move all terms to the left:
83+3x/4-(90)=0
We add all the numbers together, and all the variables
3x/4-7=0
We multiply all the terms by the denominator
3x-7*4=0
We add all the numbers together, and all the variables
3x-28=0
We move all terms containing x to the left, all other terms to the right
3x=28
x=28/3
x=9+1/3
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