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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.
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