Решите уравнение х+6.17/26=8.1/39

х + 6 17/26 = 8 1/39

х + 6 51/78 = 8 2/78

х = 8 2/78 - 6 51/78

х = 7 80/78 - 6 51/78

х = 1 целая 29/78

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проверка: 1 29/78 + 6 17/26 = 1 29/78 + 6 51/78 = 7 80/78 = 8 2/78 = 8 1/39.

1+2*(3+4*5)=47

1)х*6о=6907+43493

60х=50400

х=50400: 60

х=840

2)40450: х=7621-7571

40450: х=50

х=40450: 50

х=809