3r/4-4/5=7/10

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Solution for 3r/4-4/5=7/10 equation: 


r in (-oo:+oo)

(3*r)/4-(4/5) = 7/10 // - 7/10

(3*r)/4-(4/5)-(7/10) = 0

(3*r)/4-4/5-7/10 = 0

3/4*r-3/2 = 0 // + 3/2

3/4*r = 3/2 // : 3/4

r = 3/2/3/4

r = 2

r = 2

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