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mursalovasuriya

Ответ:

a)3 < b < 7 \ 3 + 1 < b + 1 < 7 + 1 :  :  :  :  : 4 < b + 1 < 8 \ b)  3 times 9 <9 b < 7 times 9 \ 27 < 9b < 63 \ c)23 - 7 < 23 - b < 23 - 3\ 16 < 23 - b < 20 \ d) frac{1}{7}  <  frac{1}{b}  <  frac{1}{3}

p = 2a + 7.4 \ 24.4 < p < 24.6 \ 24.4 < 2a + 7.4 < 24.6 \ 17 < 2a < 17.2 \  8.5 < a < 8.6

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