Question

using commutative property for addition of rational number :
-5/9 +2/7​

Answer 1

Step-by-step explanation:

5 + 2

9 7

LCM of 7 and 9 is 63

5 = 5 X 7 = 35

9 = 9 X 7 = 63

2 = 2 X 9 = 18

7 = 7 X 9 = 63

35 + 18 = 53

63

Therefore, 53 is your answer.

63

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