Решите уравнение: а)1 3/7-3/14x=5/7 б)-1 7/12-1 - вопрос №399116213731457171213418 от maryg14 21.04.2020 05:06

Question

Математика: Решите уравнение: а)1 3/7-3/14x=5/7 б)-1 7/12-1 3/4x=1/8

maryg14 · Answer

1 ( 3/7 ) - ( 3/14 ) X = 5/7
( 10/7 ) - ( 3/14 ) X = 5/7
( 20 - 3X ) / 14 = 10/14
20 - 3X = 10
3X = 20 - 10
3X = 10
X = 3 ( 1/3 )

- 1 ( 7/12 ) - 1 ( 3/4 ) X = 1/8
- ( 19/12 ) - ( 7/4 ) X = 1/8
( 76 - 84X ) / 48 = 6/48
76 - 84X = 6
84X = 70
X = 70/84 = 35/42 = 5/6