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

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Solution for 7+7(3-r)=-2(1-4r) equation: 



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-7r-(-2(-4r+1))+21+7=0



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

-2(-4r+1)

We multiply parentheses

8r-2

Back to the equation:

-(8r-2)



We add all the numbers together, and all the variables

-7r-(8r-2)+28=0

We get rid of parentheses

-7r-8r+2+28=0

We add all the numbers together, and all the variables

-15r+30=0

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

-15r=-30

r=-30/-15

r=+2

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