3k-9=3k/4

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Solution for 3k-9=3k/4 equation: 


k in (-oo:+oo)

3*k-9 = (3*k)/4 // - (3*k)/4

3*k-((3*k)/4)-9 = 0

3*k+(-3/4)*k-9 = 0

9/4*k-9 = 0 // + 9

9/4*k = 9 // : 9/4

k = 9/9/4

k = 4

k = 4

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