126=6-4(5-5r)

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Solution for 126=6-4(5-5r) equation: 



126=6-4(5-5r)

We move all terms to the left:

126-(6-4(5-5r))=0

We add all the numbers together, and all the variables

-(6-4(-5r+5))+126=0



We calculate terms in parentheses: -(6-4(-5r+5)), so:

6-4(-5r+5)

determiningTheFunctionDomain
-4(-5r+5)+6

We multiply parentheses

20r-20+6

We add all the numbers together, and all the variables

20r-14

Back to the equation:

-(20r-14)



We get rid of parentheses

-20r+14+126=0

We add all the numbers together, and all the variables

-20r+140=0

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

-20r=-140

r=-140/-20

r=+7

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