a/15=(a-1)/12

Solution for a/15=(a-1)/12 equation:

a/15=(a-1)/12

We move all terms to the left:

a/15-((a-1)/12)=0

We calculate fractions


12a^2/()+(-((a-1)*15)/()=0


We calculate terms in parentheses: +(-((a-1)*15)/(), so:

-((a-1)*15)/(

We multiply all the terms by the denominator


-((a-1)*15)


We calculate terms in parentheses: -((a-1)*15), so:

(a-1)*15

We multiply parentheses

15a-15

Back to the equation:

-(15a-15)


We get rid of parentheses

-15a+15

Back to the equation:

+(-15a+15)


We get rid of parentheses

12a^2/()-15a+15=0

We multiply all the terms by the denominator


12a^2-15a*()+15*()=0

We add all the numbers together, and all the variables

12a^2-15a*()=0