Question 257737
a/b=5/2
.5(a+b)=10.5
a+b=21
a=21-b
(21-b)/b=5/2
42-2b=5b
42=7b
b=6
a=21-6=15
a=15
check
15/6=5/2
.5(21)=10.5
10.5=10.5
 ok