Question

please answer the first part a ​

Answer 1

Answer:

$x \times (y \times z) = (x \times y) \times z \\ - 7 \div 8 \times ( (- 4 \div 7) \times 7 \div 9) = (( - 7 \div 8) \times ( - 4 \div 7)) \times 7 \div 9 \\ 7 \div 8 \times ( - 4 \div 9) = 4 \div 8 \times 7 \div 9 \\ 28 \div 72 = 28 \div 72 \\ 7 \div 18 = 7 \div 18$

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