Example 12 - Chapter 7 Class 7 - Finding the Unknown (Ganita Prakash II)

Transcript

Example 12 Ramesh and Suresh have 60 marbles between them. Ramesh has 30 more marbles than Suresh. How many marbles does each boy have?Let Number of marbles with Suresh = x Given that Ramesh has 30 more marbles than Suresh So, we can write Number of marbles with Ramesh = Marbles with Suresh + 30 = x + 30 Also, given that Ramesh and Suresh have 60 marbles between them Thus, we can write Marbles with Ramesh + Marbles with Suresh = 60 Putting values (x + 30) + x = 60 x + 30 + x = 60 2x + 30 = 60 Taking 30 to right side, so it becomes subtraction 2x = 60 – 30 2x = 30 Taking 2 to right side, so it becomes division x = 30/2 x = 15 Thus, Number of marbles with Suresh = x = 15 Number of marbles with Ramesh = x + 30 = 15 + 30 = 45 So, Suresh has 15 marbles, and Ramesh has 45 marbles.