5(4=r)=1/2(40=10r)

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Solution for 5(4=r)=1/2(40=10r) equation: 



5(4=r)=1/2(40=10r)

We move all terms to the left:

5(4-(r))=0

We add all the numbers together, and all the variables

5(-1r+4)=0

We multiply parentheses

-5r+20=0

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

-5r=-20

r=-20/-5

r=+4

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