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miron2077

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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mursalovasuriya

Ответ:

1)3 div ( frac{6}{7}  -  frac{3}{4}) = 3 div ( frac{24 - 21}{28}  ) = 3 div  frac{3}{28}  = 3 times  frac{28}{3}  = 28 \  \ 4.5 times 5.4 - 6.1 = 24.3 - 6.1 = 18.2

2)2 - 3(2x + 2) = 5 - 4x \ 2 - 6x - 6 = 5 - 4x \  - 6x + 4x = 5 - 2 + 6 \  - 2x = 9 \ x =  - 4.5

3)112 times 100 div 14 = 800

в школе всего 800 учащихся

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