Question

2. If r=7 is a solution to -6r+18=k(x-15), then which of the following must be the value of K?

(1)-8
(3)3
(2) -4
(4) 11

Answer 1

Answer: (1)-8

Step-by-step explanation: −6r+18=k(x−15)

Step 1: Flip the equation.

kx−15k=−6r+18

Step 2: Factor out variable k.

k(x−15)=−6r+18

Step 3: Divide both sides by x-15.

k(x−15)/x-15 =

−6r+18/x-15

k= −6r+18/x-15= -8