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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



We calculate terms in parentheses: -(2(-7r+2)), so:

2(-7r+2)

We multiply parentheses

-14r+4

Back to the equation:

-(-14r+4)



We get rid of parentheses

2r+14r-4-4=0

We add all the numbers together, and all the variables

16r-8=0

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

16r=8

r=8/16

r=1/2

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