решите уравнение пж срочно надо (дроби)
4/15 y = 2/5
7/8 y = 14
9/10 y = 4 1/2

(1/4+1/5) х = 1 4/5
(2 1/12 - 1 5/6) х = 3/4

Спасибо большое! Я так рада!

Тоже спасибо

(1/4+1/5) х = 1 4/5(5+4)x/20 = 9/59x/20 = 9/59x = 20*9/59x = 4*9x =  4*9/9x = 4(2 1/12 - 1 5/6) х = 3/4(25/12 - 11/6)x =  3/4(25 - 22)x/12 = 3/43x/12  =  3/43x = 12*3/43x = 9x = 34/15 y = 2/54y/15 = 2/54y = 15*2/54y = 6y = 1.57/8 y = 147y/8 = 147y = 14*8y = 14*8/7y = 169/10 y = 4 1/29y/10 = 9/29y = 9*10/29y = 45y = 45/9y = 5

1)14/15 у = 2/5

у = 2/5 : 4/15

у = 3/2 = 1целая 1/2

2)7/8у = 14

у = 14 : 7/8

у= 16

3)9/10у = 9/2

у = 9/2 : 9/10

у= 5

4)(1/4 + 1/5)х = 9/5

(5/20 + 4/20)х = 9/5

9/20х = 9/5

х= 9/5 : 9/20 = 4

5) (25/12 - 22/12)х = 3/4

1/4х = 3/4

х = 3/4 : 1/4

х = 3