Question

13. By what number should (-7)-2 be multiplied so that the product obtained is (-21)-3?​

Answer 1

Step-by-step explanation:

$let \: the \: number \: be \: x \\ = ( - 7) - 2 \times x = ( - 21) - 3 \\ = - 9(x) = - 24 \\ = - 9x = - 24 \\ = x = - 24 \div 9 \\ = x = 8 \3$