3=10(2+5r)

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Solution for 3=10(2+5r) equation: 



3=10(2+5r)

We move all terms to the left:

3-(10(2+5r))=0

We add all the numbers together, and all the variables

-(10(5r+2))+3=0



We calculate terms in parentheses: -(10(5r+2)), so:

10(5r+2)

We multiply parentheses

50r+20

Back to the equation:

-(50r+20)



We get rid of parentheses

-50r-20+3=0

We add all the numbers together, and all the variables

-50r-17=0

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

-50r=17

r=17/-50

r=-17/50

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