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| 0,1*½x+0,02y = 0,03 (½x+y)
| ½x+y = 40
| (1/10 *1/2) x + 2/100y = (3/100*1/2)x + 3/100y
| y = 40 -1/2x
1/20x + 2/100y = 3/200x + 3/100y /*200
|y = 40 -1/2x
| 10x + 4y = 3x + 6y
10x - 3x = 6y-4y
7x = 2y
7x = 80-x
8x = 80
x = 10
y = 40 -5 = 35
| 0,1*½x+0,02y = 0,03 (½x+y)
1/2x = 40-y
0,1*(40-y) + 0,02y = 0,03(40-y+y)
4-0,1y +0,02y = 1,2
-0,08y = 1,2-4
-0,08y = -2,8/ :-0,08
y= 35
1/2 x = 40-35
1/2 x = 5 /*2
x=10