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15+4x/5=9
We move all terms to the left:
15+4x/5-(9)=0
We add all the numbers together, and all the variables
4x/5+6=0
We multiply all the terms by the denominator
4x+6*5=0
We add all the numbers together, and all the variables
4x+30=0
We move all terms containing x to the left, all other terms to the right
4x=-30
x=-30/4
x=-7+1/2
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