first use distributive property
10K - 90 = -10
now add 90 to both sides
10K = 80
now divide both sides by 10
K = 8
and there's your answer!
first use distributive property
10K - 90 = -10
now add 90 to both sides
10K = 80
now divide both sides by 10
K = 8
and there's your answer!