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((x+3)/5)+((x+5)/4)-3=0
We calculate fractions
(4x+12)/()+(5x+25)/()-3=0
We multiply all the terms by the denominator
(4x+12)+(5x+25)-3*()=0
We add all the numbers together, and all the variables
(4x+12)+(5x+25)=0
We get rid of parentheses
4x+5x+12+25=0
We add all the numbers together, and all the variables
9x+37=0
We move all terms containing x to the left, all other terms to the right
9x=-37
x=-37/9
x=-4+1/9
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