Question

De la 23 doar a,b si c

Answer 1

Răspuns:

a) x/y=7/4

b) x/y=58/30

c) x/y=22/12

Explicație pas cu pas:

a) x-y/y=3/4

3y=4×(x-y)

3y=4x-4y

3y+4y=4x

7y=4x

x/y=7/4

b) 2x+y/y=73/15

73y=15×(2x+y)

73y=30x+15y

73y-15y=30x

58y=30x

x/y=58/30

c) 3x-y/2y=9/4

9×2y=4×(3x-y)

18y=12x-4y

18y+4y=12x

22y=12x

x/y=22/12