9(42)-9(4)=9(30)+9(r)

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Solution for 9(42)-9(4)=9(30)+9(r) equation: 



9(42)-9(4)=9(30)+9(r)

We move all terms to the left:

9(42)-9(4)-(9(30)+9(r))=0

We add all the numbers together, and all the variables

-(9r+930)+942-94=0

We add all the numbers together, and all the variables

-(9r+930)+848=0

We get rid of parentheses

-9r-930+848=0

We add all the numbers together, and all the variables

-9r-82=0

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

-9r=82

r=82/-9

r=-9+1/9

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