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3+2x/5=12
We move all terms to the left:
3+2x/5-(12)=0
We add all the numbers together, and all the variables
2x/5-9=0
We multiply all the terms by the denominator
2x-9*5=0
We add all the numbers together, and all the variables
2x-45=0
We move all terms containing x to the left, all other terms to the right
2x=45
x=45/2
x=22+1/2
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