Question (d) - Page 25 (Figure it out) - Quick Recap on Intergers - Chapter 2 Class 7 - Operations with Integers (Ganita Prakash II)

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Question (d) - Page 25 (Figure it out) Let us try to find a few more pairs of numbers from their sums and differences: (d) Sum = 0, Difference = –10 Guessing this would be very time consuming We can do this by Algebra Since we need to find two numbers, We can write the situation as 1st Number + 2nd Number = 0 1st Number – 2nd Number = –10 Adding (1) & (2) (1st Number + 2nd Number) + (1st Number – 2nd Number) = 0 – 10 2 × 1st Number = –10 1st Number = (−10)/2 1st Number = –5 Now, putting value in (1) 1st Number + 2nd Number = 0 –5 + 2nd Number = 0 2nd Number = 0 + 5 2nd Number = 5 Thus, the two numbers are –5 and 5