Question

7. if 3 is a solution of 3x+ (k- 1)x+9-0, then k=?​

Answer 1

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Answer 2

Answer:

-2/3

Step-by-step explanation:

3x + (k-1)×9-0=3

then, 3x+(k-1)×9=3

then, 3x+9k-9=3

then,3x+9k=-6

3(x+3k)=-6

x+3k=-2

•x=-2

or,3k=-2

then,k=-2/3