Решить уравнения: x/9 - 7/9 = 3 7/9 5 4/15 - x/15 - вопрос №231664897937954151547153181919 от supersuperolga1 07.04.2020 06:25

Question

Математика: Решить уравнения: x/9 - 7/9 = 3 7/9 5 4/15 - x/15 = 4 7/15 3 18/19+ x/19= 15/19

supersuperolga1 · Answer

X/9 - 7/9 = 3  7/9х/9 = 34/9 + 7/9х/9 = 41/9х = 41/9 * 9х = 4141/9 - 7/9 = 3 7/934/9 = 3 7/93 7/9 = 3 7/95  4/15 - x/15 = 4  7/1579/15 - х/15 = 67/15х/15 = 79/15 - 67/15х/15 = 12/15х = 12/15 * 15х = 1279/15 - 12/15 = 67/1567/15 = 67/154 7/15 = 4 7/153  18/19+ x/19= 15/1975/19 + х/19 = 15/19х/19 = 15/19 - 75/19х/19 = - 60/19х = - 60/19 * 19х = - 6075/19 + (- 60/19) = 15/1975/19 - 60/19 = 15/1915/19 = 15/19...