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
