3k+7=9+k

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Solution for 3k+7=9+k equation: 


k in (-oo:+oo)

3*k+7 = k+9 // - k+9

3*k-k-9+7 = 0

2*k-2 = 0 // + 2

2*k = 2 // : 2

k = 2/2

k = 1

k = 1

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