Question

10. Determinaţi valoarea expresiei x - y +z, dacă:
a) x=-3, y = -7, z=-12;
b) x = 9, y = 12, z=-8;
c) r=-21, y=-6, z =17.​

Answer 1

a) -3+7-12=4-12=-8
b) 9-12-8=9-20=-11
c)-21+6+17=-21+23=2

Answer 2

a) x-y+z=(-3)-(-7)+(-12)=-3+7-12=4-12=-8

b)x-y+z=9-12+(-8)=-3-8=-11

c)x-y+z=(-21)-(-6)+17=-21+6+17=-15+17=2