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Answer:
b) 31/28
Step-by-step explanation:
Sum of -1/2 and -4/7
LCM of 2 and 7 is 14.
(-7-8)/14
-15/14
Sum of 3/4 and -5/7
LCM of 4 and 7 is 28.
(21-20)/28
1/28
According to question,
(1/28) - (-15/14)
[1-(-30)]/28
(1+30)/28
31/28
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