4/5 - /7 =
4/5 - 2/7
5 * 7 = 35
7 * 4 = 28
5 * 2 = 10
28/35 - 10/35 = 18/35
Answer:
Step-by-step explanation:
= 5 • ( 4• x )
= 5 ( 4x )
= 20x