Odpowiedzi

2010-02-03T16:55:57+01:00
X-cena bananów
y-cena winogron

3x+5y=26
4x+7y=36

-12x-20y=-104
12x+21y=108

y=4
x=2

7 4 7
2010-02-03T16:56:39+01:00
3x+5y=26/-4
4x+7y=36/3

-12x-20y=-104
12x+21y=108

1y=4

3x+20=26
3x=6
x=2
7 5 7
2010-02-03T16:57:57+01:00
X- banany
y-winogrona

3x+5y=26 //*-4
4x+7y=36 // * 3

-12x-20y=-104
12x+21y=108
___________
y= 4 zł

3x+5 * 4 = 26
3x+20 =26
3x=6
x=2 zł




4 5 4