(x-3)/5=(3x)/7

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Solution for (x-3)/5=(3x)/7 equation: 


x in (-oo:+oo)

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

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

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

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

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

7*(x-3)-3*5*x = 0

-8*x-21 = 0

(-8*x-21)/(5*7) = 0

(-8*x-21)/(5*7) = 0 // * 5*7

-8*x-21 = 0

-8*x-21 = 0 // + 21

-8*x = 21 // : -8

x = 21/(-8)

x = -21/8

x = -21/8

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