7(r+1)=3(r-1)

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Solution for 7(r+1)=3(r-1) equation: 



7(r+1)=3(r-1)

We move all terms to the left:

7(r+1)-(3(r-1))=0

We multiply parentheses

7r-(3(r-1))+7=0



We calculate terms in parentheses: -(3(r-1)), so:

3(r-1)

We multiply parentheses

3r-3

Back to the equation:

-(3r-3)



We get rid of parentheses

7r-3r+3+7=0

We add all the numbers together, and all the variables

4r+10=0

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

4r=-10

r=-10/4

r=-2+1/2

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