2+7r=4r+2(r-1)

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Solution for 2+7r=4r+2(r-1) equation: 



2+7r=4r+2(r-1)

We move all terms to the left:

2+7r-(4r+2(r-1))=0



We calculate terms in parentheses: -(4r+2(r-1)), so:

4r+2(r-1)

We multiply parentheses

4r+2r-2

We add all the numbers together, and all the variables

6r-2

Back to the equation:

-(6r-2)



We get rid of parentheses

7r-6r+2+2=0

We add all the numbers together, and all the variables

r+4=0

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

r=-4

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