1.Oblicz wartość wyrażenia: 4x+3z-5y-2 gdy x=3 y=2 z=4
2.Doprowadź wyrażenie 12x-8y+3y-7x+5y do najprostrzej postaci i oblicz jego wartość, gdy x=5 i y=7
3.3a-b+5a+2b-6 gdy a=2 i b=2
4.x+2y-3y-3z+5z-x gdy x=5, y=8, z=6
5.3(x-4z+y+4x-z+2y) gdy x=1, y=2, z=12
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1. 4*3 + 3*4 - 5*2 - 2 = 12 + 12 - 10 - 2 = 12
2. 12x - 8y +3y - 7x +5y = 5x + 6y = 5*5 + 6*7 = 25 + 42 = 67
3. 3a - b + 5a + 2b - 6 = 8a + b - 6 = 8*2 + 2 - 6 = 16 + 2 - 6 = 12
4. x + 2y - 3y - 3z + 5z - x = -y + 2z = -8 + 2*6 = -8 + 12 = 4
5. 3(x - 4z + y + 4x - z + 2y) = 3x - 12z + 3y + 12x - 3z + 6y = 15x + 9y - 15z = 15*1 + 9*2 - 15*12 = 15 + 18 - 180 = -147
zad 1.
4x+3z-5y-2 gdy x=3 y=2 z=4
4x+3z-5y-2 = 4 * 3 + 3 * 4 - 5 * 2 - 2 = 12 + 12 - 10 - 2 = 24 - 12 = 12
zad 2
12x-8y+3y-7x+5y gdy x=5 i y=7
5x = 5 * 5 = 25
zad 3
3a-b+5a+2b-6 gdy a=2 i b=2
8a + b - 6 = 8 * 2 + 1 - 6 = 16 + 1 - 6 = 17 - 6 = 11
zad 4
.x+2y-3y-3z+5z-x gdy x=5, y=8, z=6
2z - y = 2 * 6 - 8 = 12 - 8 = 4
zad 5
3(x-4z+y+4x-z+2y) gdy x=1, y=2, z=12
3x - 12z + 3y + 12x - 3z + 6y = 15x + 9y - 15z = 15 * 1 + 9 * 2 - 15 * 12 = 15 + 18 - 180 = 33 - 180 = - 147