(X-12)/4=(x+3)/5

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Solution for (X-12)/4=(x+3)/5 equation: 



(X-12)/4=(X+3)/5

We move all terms to the left:

(X-12)/4-((X+3)/5)=0

We calculate fractions


X/()+(-((X+3)*4)/()=0



We calculate terms in parentheses: +(-((X+3)*4)/(), so:

-((X+3)*4)/(

We multiply all the terms by the denominator


-((X+3)*4)



We calculate terms in parentheses: -((X+3)*4), so:

(X+3)*4

We multiply parentheses

4X+12

Back to the equation:

-(4X+12)



We get rid of parentheses

-4X-12

Back to the equation:

+(-4X-12)



We get rid of parentheses

X/()-4X-12=0

We multiply all the terms by the denominator


X-4X*()-12*()=0

We add all the numbers together, and all the variables

X-4X*()=0

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