Question

3. Rohan spends x daily and saves y per day. What is his income after 3 weeks?​

Answer 1

Amount of money spend in 1 day = x

So, amount of money spend in 7 days = (7x)

⇒ Amount of money spend in 1 week = (7x)

Amount of money saved in 1 week = y

∴ Income in 1 week = (7x + y)

So, income in 3 weeks = [3 x (7x + y)]

= (21x + 3y)

Answer 2

Step-by-step explanation:

Amount of money spend in 1 day = x

So, amount of money spend in 7 days: = (7x)

→ Amount of money spend in 1 week =

(7x)

Amount of money saved in 1 week = y

.: Income in 1 week = (7x + y)

So, income in 3 weeks = [3 x (7x + y)] =

(21x + 3y)