-240=4(2-7r)-3r

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Solution for -240=4(2-7r)-3r equation: 



-240=4(2-7r)-3r

We move all terms to the left:

-240-(4(2-7r)-3r)=0

We add all the numbers together, and all the variables

-(4(-7r+2)-3r)-240=0



We calculate terms in parentheses: -(4(-7r+2)-3r), so:

4(-7r+2)-3r

We add all the numbers together, and all the variables

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

We multiply parentheses

-3r-28r+8

We add all the numbers together, and all the variables

-31r+8

Back to the equation:

-(-31r+8)



We get rid of parentheses

31r-8-240=0

We add all the numbers together, and all the variables

31r-248=0

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

31r=248

r=248/31

r=8

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