3y/7x=9 - solution

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Solution for 3y/7x=9 equation:

x in (-oo:+oo)

x*((3*y)/7) = 9 // - 9

x*((3*y)/7)-9 = 0

3/7*x*y-9 = 0 // + 9

3/7*x*y = 9 // : 3/7*y

x = 9/(3/7*y)

x = 21*y^-1

x = 21*y^-1

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