(x+3x)/2=6

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Solution for (x+3x)/2=6 equation: 


x in (-oo:+oo)

(x+3*x)/2 = 6 // - 6

(x+3*x)/2-6 = 0

(4*x)/2-6 = 0

(4*x)/2+(-6*2)/2 = 0

4*x-6*2 = 0

4*x-12 = 0

(4*x-12)/2 = 0

(4*x-12)/2 = 0 // * 2

4*x-12 = 0

4*x-12 = 0 // + 12

4*x = 12 // : 4

x = 12/4

x = 3

x = 3

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