Question

Given 10k -4 =2k-20 prove k=-2

Answer 1

Answer:

10k-4=2k-20

     +4       +4

10k=2k-16

-2k  -2k

8k=-16

$\frac{8k}{8}=\frac{-16}{8}$

k=-2

Check:

10(-2)-4=2(-2)-20

-20-4=-4-20

-24=-24  

Step-by-step explanation:

Answer 2

Answer:

10.k-4=2.k-20

10k-2k=-20+4

8k=-16

K=-2

Step-by-step explanation: