40=2r+32

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Solution for 40=2r+32 equation: 



40=2r+32

We move all terms to the left:

40-(2r+32)=0

We get rid of parentheses

-2r-32+40=0

We add all the numbers together, and all the variables

-2r+8=0

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

-2r=-8

r=-8/-2

r=+4

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