3x/7=4y/5

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Solution for 3x/7=4y/5 equation: 


x in (-oo:+oo)

(3*x)/7 = (4*y)/5 // - (4*y)/5

(3*x)/7-((4*y)/5) = 0

(3*x)/7+(-4/5)*y = 0

3/7*x-4/5*y = 0 // + -4/5*y

3/7*x = -(-4/5*y) // : 3/7

x = (-(-4/5*y))/3/7

x = 28/15*y

x = 28/15*y

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