3-9r=4r+10(11-12r)

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Solution for 3-9r=4r+10(11-12r) equation: 



3-9r=4r+10(11-12r)

We move all terms to the left:

3-9r-(4r+10(11-12r))=0

We add all the numbers together, and all the variables

-9r-(4r+10(-12r+11))+3=0



We calculate terms in parentheses: -(4r+10(-12r+11)), so:

4r+10(-12r+11)

We multiply parentheses

4r-120r+110

We add all the numbers together, and all the variables

-116r+110

Back to the equation:

-(-116r+110)



We get rid of parentheses

-9r+116r-110+3=0

We add all the numbers together, and all the variables

107r-107=0

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

107r=107

r=107/107

r=1

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