3=8-r/2

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Solution for 3=8-r/2 equation: 



3=8-r/2

We move all terms to the left:

3-(8-r/2)=0

We add all the numbers together, and all the variables

-(-r/2+8)+3=0

We get rid of parentheses

r/2-8+3=0

We multiply all the terms by the denominator


r-8*2+3*2=0

We add all the numbers together, and all the variables

r-10=0

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

r=10

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