4(1-r)+9=4r

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Solution for 4(1-r)+9=4r equation: 



4(1-r)+9=4r

We move all terms to the left:

4(1-r)+9-(4r)=0

We add all the numbers together, and all the variables

4(-1r+1)-4r+9=0

We add all the numbers together, and all the variables

-4r+4(-1r+1)+9=0

We multiply parentheses

-4r-4r+4+9=0

We add all the numbers together, and all the variables

-8r+13=0

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

-8r=-13

r=-13/-8

r=1+5/8

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