2(5-2r)=-9r+40

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Solution for 2(5-2r)=-9r+40 equation: 



2(5-2r)=-9r+40

We move all terms to the left:

2(5-2r)-(-9r+40)=0

We add all the numbers together, and all the variables

2(-2r+5)-(-9r+40)=0

We multiply parentheses

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

5r-30=0

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

5r=30

r=30/5

r=6

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