7+3r=r-4(2-r)

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Solution for 7+3r=r-4(2-r) equation: 



7+3r=r-4(2-r)

We move all terms to the left:

7+3r-(r-4(2-r))=0

We add all the numbers together, and all the variables

3r-(r-4(-1r+2))+7=0



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

r-4(-1r+2)

We multiply parentheses

r+4r-8

We add all the numbers together, and all the variables

5r-8

Back to the equation:

-(5r-8)



We get rid of parentheses

3r-5r+8+7=0

We add all the numbers together, and all the variables

-2r+15=0

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

-2r=-15

r=-15/-2

r=7+1/2

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