Question

please help me
please​

Answer 1

Step-by-step explanation:

i) -6

ii) -18

iii) -16

iv) 11

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Answer 2

$(i) \frac{66}{a}=-11\\\\ a=\frac{66}{-11}\\ \\ a=-6 \\----------------\\(ii)\frac{90}{-a}=5\\\\ -a=\frac{90}{5}\\ -a=16\\ a=-16\\---------------------\\(iii) \frac{a}{1}=-16\\a=-16*1\\a=-16\\-------------------\\(iv) \frac{-81}{a-2}=-9\\\\\frac{-81}{-9}=a-2\\\\a-2=9\\\\a=9+2\\\\a=11$