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

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Solution for (3-x)/7=(x-9)/3 equation: 


x in (-oo:+oo)

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

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

(3-x)/7+(-1*(x-9))/3 = 0

(3*(3-x))/(3*7)+(-1*7*(x-9))/(3*7) = 0

3*(3-x)-1*7*(x-9) = 0

72-10*x = 0

(72-10*x)/(3*7) = 0

(72-10*x)/(3*7) = 0 // * 3*7

72-10*x = 0

72-10*x = 0 // - 72

-10*x = -72 // : -10

x = -72/(-10)

x = 36/5

x = 36/5

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