-1/2(8+5r)=20

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Solution for -1/2(8+5r)=20 equation: 



-1/2(8+5r)=20

We move all terms to the left:

-1/2(8+5r)-(20)=0



Domain of the equation: 2(8+5r)!=0

r∈R



We add all the numbers together, and all the variables

-1/2(5r+8)-20=0

We multiply all the terms by the denominator


-20*2(5r+8)-1=0

Wy multiply elements

-40r(5-1=0

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