7.74=3.07(r+9)+1.6

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Solution for 7.74=3.07(r+9)+1.6 equation: 



7.74=3.07(r+9)+1.6

We move all terms to the left:

7.74-(3.07(r+9)+1.6)=0



We calculate terms in parentheses: -(3.07(r+9)+1.6), so:

3.07(r+9)+1.6

We multiply parentheses

3.07r+27.63+1.6

We add all the numbers together, and all the variables

3.07r+29.23

Back to the equation:

-(3.07r+29.23)



We get rid of parentheses

-3.07r-29.23+7.74=0

We add all the numbers together, and all the variables

-3.07r-21.49=0

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

-3.07r=21.49

r=21.49/-3.07

r=-7

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