2(10r-7)=-2(1+10r)

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Solution for 2(10r-7)=-2(1+10r) equation: 



2(10r-7)=-2(1+10r)

We move all terms to the left:

2(10r-7)-(-2(1+10r))=0

We add all the numbers together, and all the variables

2(10r-7)-(-2(10r+1))=0

We multiply parentheses

20r-(-2(10r+1))-14=0



We calculate terms in parentheses: -(-2(10r+1)), so:

-2(10r+1)

We multiply parentheses

-20r-2

Back to the equation:

-(-20r-2)



We get rid of parentheses

20r+20r+2-14=0

We add all the numbers together, and all the variables

40r-12=0

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

40r=12

r=12/40

r=3/10

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