The average of two test scores is 79. If one test score is eleven less than the other, what are the two test scores?
a=first score
b=second score
b=a-11
(a+b)/2=79
a+a-11=2*79
2a-11=158
2a=158+11
2a=169 Divide with 2
a=169/2= 84.5
b=a-11
b=84.5-11
b=73.5
(a+b)/2= (84.5+73.5)/2=158/2=79