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0,4x =¾y
x+y = 92
⅖ x = ¾y
x+y = 92
x = ¾y *5/2
x+y = 92
x = 15/8
15/8 + y = 92
x = 15/8
y = 92 - 15/8
x = 15/8
y = 92 - 1⅞
x = 15/8
y = 90⅛
x = 1⅞
y druga liczba
x+y=92
40%x=3/4y
x=92-y
40/100 x=3/4y
x=92-y
4/10 (92-y)=3/4y
x=92-y
4/10 razy 92-4/10 y=3/4y
x=92-y
368/10-4/10y=3/4y
x=92-y
36,8=15/20y+8/20y
x=92-y
36,8=23/20 y
x=92-y
y=36,8 razy 20/23
x=92-y
y=32
x=60
y=32
II liczba-92-x
rozw:0,40*x=¾(92-x)
0,4x=69-¾x
0,4x+o,75x=69
1,15x=69/:1,15
x=60
I liczba=60
II liczba=92-60=32
spr:
0,4*60=24
¾*38=24