Answer:
5.4
Step-by-step explanation:
7.2/4 =1.8
3x1.8 = 5.4
Answer:

Step-by-step explanation:

Answer:
A rational number is a number that can be represented a/b where a and b are integers and b is not equal to 0.
Find the common denominator.
Multiply everything by the common denominator.
Simplify.
Check the answer(s) to make sure there isn't an extraneous solution.