1 rozwiaz rownanie metoda wspolczynikow lub podstawiania
2 rozwiaz nierownosci
3rozwiaz rowanie
zad 1
(x + 1)/2 - (y - 1)/3 = 1
5x - 2y = 1
3(x + 1) - 2(y - 1) = 6
3x + 3 - 2y + 1 = 6
3x - 2y = 6 - 1 - 3
3x - 2y = 2 mnożymy przez - 1
- 3x + 2y = - 2
dodajemy stronami
- 3x + 2y + 5x - 2y = -2 + 1
2x = - 1
x = - 1/2
5 * - 1/2 - 2y = 1
- 5/2 - 2y = 1
- 2y = 1 + 5/2
- 2y = 7/2
2y = - 7/2
y = - 3,5
zad 2
8 - 4(3 + x)≥ -12 + 4x
8 - 12 - 4x ≥ -12 + 4x
- 4 - 4x ≥ - 12 + 4x
- 4x - 4x ≥ - 12 + 4
- 8x ≥ - 8
8x ≤ 8
x ≤ 8/8
x ≤ 1
zad 3
5 + (x - 2)/3 = -4(2 - 3x) + 2/3
15 + x - 2 = -12(2 - 3x) + 2
13 + x = -24 + 36x + 2
x - 36x = - 24 - 13 + 2
- 35x = 35
x = - 35/35
x = - 1
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zad 1
(x + 1)/2 - (y - 1)/3 = 1
5x - 2y = 1
3(x + 1) - 2(y - 1) = 6
5x - 2y = 1
3x + 3 - 2y + 1 = 6
5x - 2y = 1
3x - 2y = 6 - 1 - 3
5x - 2y = 1
3x - 2y = 2 mnożymy przez - 1
5x - 2y = 1
- 3x + 2y = - 2
5x - 2y = 1
dodajemy stronami
- 3x + 2y + 5x - 2y = -2 + 1
2x = - 1
x = - 1/2
5x - 2y = 1
5 * - 1/2 - 2y = 1
- 5/2 - 2y = 1
- 2y = 1 + 5/2
- 2y = 7/2
2y = - 7/2
y = - 3,5
zad 2
8 - 4(3 + x)≥ -12 + 4x
8 - 12 - 4x ≥ -12 + 4x
- 4 - 4x ≥ - 12 + 4x
- 4x - 4x ≥ - 12 + 4
- 8x ≥ - 8
8x ≤ 8
x ≤ 8/8
x ≤ 1
zad 3
5 + (x - 2)/3 = -4(2 - 3x) + 2/3
15 + x - 2 = -12(2 - 3x) + 2
13 + x = -24 + 36x + 2
x - 36x = - 24 - 13 + 2
- 35x = 35
x = - 35/35
x = - 1