Răspuns :
a)
= 3x= -72
X= -72:3= -24
b))
= -8y= -800
Y= -800:(-8)= 100
Y= 100
C))
22z= -440
Z= -440:22= -20
Z= -20
= 3x= -72
X= -72:3= -24
b))
= -8y= -800
Y= -800:(-8)= 100
Y= 100
C))
22z= -440
Z= -440:22= -20
Z= -20
foarte simple
3x+72=0 3x=-72 x=-72/3 x=-24
-8y+800=0 800=8y y=800/8 y=100
22z+440=0 22z=-440 z=-440/22 z=-20
3x+72=0 3x=-72 x=-72/3 x=-24
-8y+800=0 800=8y y=800/8 y=100
22z+440=0 22z=-440 z=-440/22 z=-20