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cum se rezolva x-y=12 daca z=10 xz-yz

Răspuns :

x-y=12
z=10
xz-yz=z(x-y)=10*12=120
[tex]x-y=12 \\ z=10 \\ xz-yz=z(x-y)=10 \cdot 12=120 \\ \boxed{xz-yz=120} [/tex]