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5x/4-3=12
We move all terms to the left:
5x/4-3-(12)=0
We add all the numbers together, and all the variables
5x/4-15=0
We multiply all the terms by the denominator
5x-15*4=0
We add all the numbers together, and all the variables
5x-60=0
We move all terms containing x to the left, all other terms to the right
5x=60
x=60/5
x=12
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