Odpowiedzi

2010-03-17T15:20:20+01:00
X-jedna liczba
y-druga liczba
x+y=200
x=200-y

25%x+20%y=44
0,25x+0,2y=44/*100
25x+20y=4400
25*(200-y)+20y=4400
5000-25y+20y=4400
-5y=4400-5000
-5y=-600/:(-5)
y=120

x=200-y
x=200-120
x=80

spr.
25%x+20%y=44
0,25*80+0,2*120=44
20+24=44
44=44
L=P

odp. Te liczby to 80 i 120.
12 4 12
2010-03-17T15:25:28+01:00
X+y=200
²⁵/₁₀₀x + ²⁰/₁₀₀y = 44 /*100

x=200-y
25x+20y=4400

x=200-y
25(200-y)+20y=4400

x=200-y
5000-25y+20y=4400

x=200-y
-5y=-600 /:(-5)

x=200-y
y=120

x=200-120
y=120

x=80
y=120

Odp. x=80, y=120
6 1 6