Question

4/7+-8/9+-13/7+17/21

Answer 1

hey mate

here is my answer

lcm = 63

36/63 -56/63 - 117/63 + 51/63


= -86/63

hope it helps uu dear

Answer 2

Hey dear!!

Here's your answer

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$\frac{4}{7} + ( - \frac{8}{9} ) + ( - \frac{13}{7} )+ \frac{17}{21} \\ = \frac{4}{7} - \frac{8}{9} - \frac{13}{7} + \frac{17}{21} \\ = \frac{(4 \times 9) - (8 \times 7) - (13 \times 9) + (17 \times 3)}{63} \\ = \frac{36 - 56 - 117 + 51}{63} \\ = \frac{87 -1 73}{63} \\ = \frac{-86}{63} \\ =-1.36507936507936$

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Hope it helps!!