4/12=(r+2)/16

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Solution for 4/12=(r+2)/16 equation: 



4/12=(r+2)/16

We move all terms to the left:

4/12-((r+2)/16)=0

We calculate fractions


(-((r+2)*12)/()+()/()=0



We calculate terms in parentheses: +(-((r+2)*12)/()+()/(), so:

-((r+2)*12)/()+()/(

We add all the numbers together, and all the variables

-((r+2)*12)/()+1

We multiply all the terms by the denominator


-((r+2)*12)+1*()



We calculate terms in parentheses: -((r+2)*12), so:

(r+2)*12

We multiply parentheses

12r+24

Back to the equation:

-(12r+24)



We add all the numbers together, and all the variables

-(12r+24)

We get rid of parentheses

-12r-24

Back to the equation:

+(-12r-24)



We get rid of parentheses

-12r-24=0

We move all terms containing r to the left, all other terms to the right

-12r=24

r=24/-12

r=-2

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