x+y=60 /*(-9)
0,85x+0,9y=52,25 /*10
-9x-9y=-540
8,5x+9y=522,5
-0,5x=-17,5
x=35
y=25
0,85*35=29,75
0,9*25=22,5
x +y=60
x=60-y
x-( 15% *x)+y(1-%*y)=52,25
(x-3/20x)+(y-1/10x)=52.25
60-y-3/20(60-y)+y+1/10y=52,25
60-y -9 +3/20y+y-1/10y=52,25
-y+3/20y +y -1/10y=52,25-60+9
3/20y -2/20y=1,25
1/20y=1,25 /*20
x=60-25
Odp. Jedna częsc tomu kosztuje 25 zł , a druga 35 zł
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x+y=60 /*(-9)
0,85x+0,9y=52,25 /*10
-9x-9y=-540
8,5x+9y=522,5
-0,5x=-17,5
x=35
y=25
0,85*35=29,75
0,9*25=22,5
x +y=60
x=60-y
x-( 15% *x)+y(1-%*y)=52,25
(x-3/20x)+(y-1/10x)=52.25
60-y-3/20(60-y)+y+1/10y=52,25
60-y -9 +3/20y+y-1/10y=52,25
-y+3/20y +y -1/10y=52,25-60+9
3/20y -2/20y=1,25
1/20y=1,25 /*20
y=25
x=60-25
x=35
Odp. Jedna częsc tomu kosztuje 25 zł , a druga 35 zł