40=2k+5k-9

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Solution for 40=2k+5k-9 equation: 


k in (-oo:+oo)

40 = 2*k+5*k-9 // - 2*k+5*k-9

9-(2*k)-(5*k)+40 = 0

9-2*k-5*k+40 = 0

49-7*k = 0 // - 49

-7*k = -49 // : -7

k = -49/(-7)

k = 7

k = 7

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