2/9r=4

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Solution for 2/9r=4 equation: 


r in (-oo:+oo)

(2/9)*r = 4 // - 4

(2/9)*r-4 = 0

2/9*r-4 = 0 // + 4

2/9*r = 4 // : 2/9

r = 4/2/9

r = 18

r = 18

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