r/2+4r=9

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Solution for r/2+4r=9 equation: 



r/2+4r=9

We move all terms to the left:

r/2+4r-(9)=0

We add all the numbers together, and all the variables

4r+r/2-9=0

We multiply all the terms by the denominator


4r*2+r-9*2=0

We add all the numbers together, and all the variables

r+4r*2-18=0

Wy multiply elements

r+8r-18=0

We add all the numbers together, and all the variables

9r-18=0

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

9r=18

r=18/9

r=2

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