4/7r=-9/5

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Solution for 4/7r=-9/5 equation: 


r in (-oo:+oo)

(4/7)*r = -9/5 // + -9/5

(4/7)*r-(-9/5) = 0

(4/7)*r+9/5 = 0

4/7*r+9/5 = 0 // - 9/5

4/7*r = -9/5 // : 4/7

r = -9/5/4/7

r = -63/20

r = -63/20

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