Solve each of the following equations : 3.2/5 – y = 2.1/2
3.2/5 – y = 2.1/2
⇒ 3.2/5 – y – 3.2/5 = 2.1/2 – 3.2/5
(Subtracting 3.2/5 from both sides)
⇒ -y = 5/2 – 17/5
= (25 – 34)/10 = -9/10
∴ y = 9/10