Question

все 4 примера ...........​

Answer 1

Ответ:

Пошаговое объяснение:

1)  x+7 12/15 = 8 1/3;

x= 8 1/3 - 7 12/15; => НОК(3;15) = 15 =>

x=8 (1*5)/(3*5) - 7 12/15;

x = 1 5/15 -12/15;

x = (15+5)/15 - 12/15;

x = 8/15.

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2)  5/7+1/6 = x/42;

5*6/7*6 + 1*7/6*7 = x/42;

30/42 + 7/42 = x/42;

37/42=x/42;

x=37.

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3)  x/50-1/50 = 4/5;

x/50 = 4/5+1/50;

x/50 = 40/50+1/50;

x/50 = 41/50;

x=41.

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4)  7 7/36 -x = 3 2/9;

x=7 7/36 - 3 2/9;

x=7 7/36 - 3 2*4/9*4;

x=7 7/36 - 3 8/36;

x= 4 (7-8)/36;

x= 3 (36+7-8)/36;

x=3 35/36.