proszę o szybką pomoc !?
Oblicz wartość liczbową wyrażenia.
a) -y+8x-z-2x
b) -8y-4z+x-y-2z+1
a) -y+8x-z-2x=6x-y-z; a) x=-2 y=6 z=-3
6*(-2)-6-(-3)=-12-6+3=-18+3=-15
b) -8y-4z+x-y-2z+1=x-9y-6z+1;b)x=0,5 y=-1 z=2
0,5-9*(-1)-6*2+1=0,5+9-12+1=-1,5
a)
-y+8x-z-2x
-6+8*(-2)-(-3)-2*(-2)= -6-16+3+4=-15
b)
-8y-4z+x-y-2z+1
-8*(-1)-4*2+0,5-(-1)-2*2+1=8-8+1,5-4+1=1,5
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a) -y+8x-z-2x=6x-y-z; a) x=-2 y=6 z=-3
6*(-2)-6-(-3)=-12-6+3=-18+3=-15
b) -8y-4z+x-y-2z+1=x-9y-6z+1;b)x=0,5 y=-1 z=2
0,5-9*(-1)-6*2+1=0,5+9-12+1=-1,5
a)
-y+8x-z-2x
-6+8*(-2)-(-3)-2*(-2)= -6-16+3+4=-15
b)
-8y-4z+x-y-2z+1
-8*(-1)-4*2+0,5-(-1)-2*2+1=8-8+1,5-4+1=1,5