12-2r=2(1+8r)-8r

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Solution for 12-2r=2(1+8r)-8r equation: 



12-2r=2(1+8r)-8r

We move all terms to the left:

12-2r-(2(1+8r)-8r)=0

We add all the numbers together, and all the variables

-2r-(2(8r+1)-8r)+12=0



We calculate terms in parentheses: -(2(8r+1)-8r), so:

2(8r+1)-8r

We add all the numbers together, and all the variables

-8r+2(8r+1)

We multiply parentheses

-8r+16r+2

We add all the numbers together, and all the variables

8r+2

Back to the equation:

-(8r+2)



We get rid of parentheses

-2r-8r-2+12=0

We add all the numbers together, and all the variables

-10r+10=0

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

-10r=-10

r=-10/-10

r=1

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