Question

Determina valoarea expresiei x-y+z,daca:
a) x=-3,y=-7,z=-12;
b) x=9,y=12,z=-8;
c) x=-21,y=-6,z=17.

Answer 1

(-3)-(-7)+(-12) = -8
9-12+(-8) = -11
(-21)-(-6)+17 = 2

Answer 2

a) -3-(-7)+(-12)=-3+7-12=
=4-12=-8
b) 9-12+(-8)=-3-8=-11
c) -21-(-6)+17=-21+6+17=
=-15+17=2