Răspuns:
Explicație pas cu pas:
a) 3x+2y+2z=3×23+2×41=69+82=151
b)5x+3y+3z=5x+3×(y+z)=5×23+3×41=115+123=238
c)8x+5y+5z=8x+5×(y+z)=8×23+41×5=184+205=389
d)4y+4z-5x=4×41-5×23=164-115=49
e)7z+7y-9x=7×41-9×23=287-207=80
f)9y+9z-7x=9×(y+z)-7x=9×41-7×23=369-161=208
