4/5=(v+4)/9

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Solution for 4/5=(v+4)/9 equation: 



4/5=(v+4)/9

We move all terms to the left:

4/5-((v+4)/9)=0

We calculate fractions


(-((v+4)*5)/()+()/()=0



We calculate terms in parentheses: +(-((v+4)*5)/()+()/(), so:

-((v+4)*5)/()+()/(

We add all the numbers together, and all the variables

-((v+4)*5)/()+1

We multiply all the terms by the denominator


-((v+4)*5)+1*()



We calculate terms in parentheses: -((v+4)*5), so:

(v+4)*5

We multiply parentheses

5v+20

Back to the equation:

-(5v+20)



We add all the numbers together, and all the variables

-(5v+20)

We get rid of parentheses

-5v-20

Back to the equation:

+(-5v-20)



We get rid of parentheses

-5v-20=0

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

-5v=20

v=20/-5

v=-4

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