Question

Eight times the sum of a number and six is 80

Answer 1

the missing number is 4.

8*(x+6)=80

divide both sides by 8

x+6=10

subtract 6 from both sides

x=4.

hope i was able to help. god bless. :D

Answer 2

8*(n+6)=80

distribute

8n+48 = 80

subtract 48 from each side

8n = 32

divide by 8

n=4