(3x-9)/15=18/12

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Solution for (3x-9)/15=18/12 equation: 


x in (-oo:+oo)

(3*x-9)/15 = 18/12 // - 18/12

(3*x-9)/15-(18/12) = 0

(3*x-9)/15-3/2 = 0

(2*(3*x-9))/(2*15)+(-3*15)/(2*15) = 0

2*(3*x-9)-3*15 = 0

6*x-63 = 0

(6*x-63)/(2*15) = 0

(6*x-63)/(2*15) = 0 // * 2*15

6*x-63 = 0

6*x-63 = 0 // + 63

6*x = 63 // : 6

x = 63/6

x = 21/2

x = 21/2

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