Answer:
a = 2.4
Explanation:
The problem statement tells you ...
b/a = 6
b - a = 12
Using the first equation, we can write an expression for b:
b = 6a . . . . . . . multiply both sides by "a"
This can be substituted into the second equation to find a value for "a":
6a -a = 12
5a = 12
a = 12/5 = 2.4
The value of a is 2.4.