Question

What is the solution to this equation? 4- 5k = -21

a.5
b.21
c.17 over 5
4 over 5

Answer 1

k = 5

Explanation:

4 - 5k = -21

Transpose and subtract 4 from both sides:

4 - 4 - 5k = -21 -4

-5k = -25

Divide both sides by -5

-5k/-5 = -25/-5

k = 5