Răspuns:
Explicație pas cu pas:
8. 4 x ( 2 x 3 ) =
= 4 x 6 =
= 24
5 x ( 2 x 3 ) =
= 5 x 6 =
= 30
2 x ( 3 x 4 ) =
= 2 x 12 =
= 24
5 x ( 3 x 2 ) =
= 5 x 6 =
= 30
3 x ( 2 x 7 ) =
= 3 x 14 =
= 42
9.x = 3 y = 4 z = 2
x + y + z = 3 + 4 + 2 = 9
x + y + 2 + z = 3 + 4 + 2 + 2 = 11
3 x X + 3 x y + 2 x z =
= 3 x 3 + 3 x 4 + 2 x 2 =
= 9 + 12 + 4 =
= 21 + 4 =
= 25
X x y x z = 3 x 4 x 2 = 12 x 2 = 24