Question

2x + y = 16
4. If 3 is a solution of 3x + (k-1) x +9=0, then find the value of k.
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Answer 1

Answer:

k=-5

Step-by-step explanation:

3is a solution means x=3

by putting the value of x.

3×3+(k-1)x+9=0

18-3+3k=0

k=-15/3

k=-5