10(1-4r)=-10(4+9r)

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Solution for 10(1-4r)=-10(4+9r) equation: 



10(1-4r)=-10(4+9r)

We move all terms to the left:

10(1-4r)-(-10(4+9r))=0

We add all the numbers together, and all the variables

10(-4r+1)-(-10(9r+4))=0

We multiply parentheses

-40r-(-10(9r+4))+10=0



We calculate terms in parentheses: -(-10(9r+4)), so:

-10(9r+4)

We multiply parentheses

-90r-40

Back to the equation:

-(-90r-40)



We get rid of parentheses

-40r+90r+40+10=0

We add all the numbers together, and all the variables

50r+50=0

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

50r=-50

r=-50/50

r=-1

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