2/3r=20

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Solution for 2/3r=20 equation: 


r in (-oo:+oo)

(2/3)*r = 20 // - 20

(2/3)*r-20 = 0

2/3*r-20 = 0 // + 20

2/3*r = 20 // : 2/3

r = 20/2/3

r = 30

r = 30

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