Rozwiąż układ równań tylko przykład D
2x-1 3y-2
------- + ---------- = 2 /*20
5 4
3x+1 3y+2
------- - --------- = 0 /*20
4(2x-1) + 5(3y-2) = 40
4(3x+1) -5(3y+2) = 0
8x -4 +15y -10 = 40
12x +4 -15y -10 = 0
8x +15y = 54
12x -15y = 6
------------------ +
20x = 60 /:20
x = 3
8*3 +15y = 54
15y = 30 /:15
y = 2
x=3
y=2
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2x-1 3y-2
------- + ---------- = 2 /*20
5 4
3x+1 3y+2
------- - --------- = 0 /*20
5 4
4(2x-1) + 5(3y-2) = 40
4(3x+1) -5(3y+2) = 0
8x -4 +15y -10 = 40
12x +4 -15y -10 = 0
8x +15y = 54
12x -15y = 6
------------------ +
20x = 60 /:20
x = 3
8*3 +15y = 54
15y = 30 /:15
y = 2
x=3
y=2