40-5r=4

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Solution for 40-5r=4 equation: 



40-5r=4

We move all terms to the left:

40-5r-(4)=0

We add all the numbers together, and all the variables

-5r+36=0

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

-5r=-36

r=-36/-5

r=7+1/5

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