Question

x-26 целых 7/21=100 целых 5/28​
И
x-33 целых 21/25=42 целых 17/35

Answer 1

Ответ:

Пошаговое объяснение:

$x-26\dfrac{7}{21} =100\dfrac{5}{28} \\ \\x=26\dfrac{7}{21} +100\dfrac{5}{28} \\ \\x=26+100+\dfrac{7}{21} +\dfrac{5}{28} \\ \\ x=126+\dfrac{7}{3*7} +\dfrac{5}{4*7} \\ \\x=126+\dfrac{7*4+5*3}{3*4*7}\\ \\x=126+\dfrac{28+15}{84}\\ \\x=126\dfrac{43}{84}$

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$x-33\dfrac{21}{25} =42\dfrac{17}{35}\\  \\x=33\dfrac{21}{25} +42\dfrac{17}{35}\\  \\x=33+42+\dfrac{21}{5*5}+\dfrac{17}{5*7} \\ \\ x=75+\dfrac{21*7+17*5}{5*5*7}\\  \\x=75+\dfrac{147+85}{175}\\ \\x=75+\dfrac{232}{175} \\  \\ x=76\dfrac{57}{175}$