9(4-r)=18

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Solution for 9(4-r)=18 equation: 



9(4-r)=18

We move all terms to the left:

9(4-r)-(18)=0

We add all the numbers together, and all the variables

9(-1r+4)-18=0

We multiply parentheses

-9r+36-18=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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