Question

calculati x-y-z+t daca:x=-3-(-4)+(-5)-(-6)-(+2);y=-1+(+4)-(-2)-(-4)+(-6);z=-3+(-6)-3-5+(-6)-(-3);t=-11+(-3)-(-6)+(-8)-(-2);

Answer 1

x=-3+4-5+6-2 
x=0
y=-1-4+2+4-6
y=-5
z=-3-6-3-5-6+3
x=-20
t=-11-3+6-8+2
t=-14
x-y-z+t=
0-5-(-20)+(-14)
=1