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daca x=3 si y+z=10 , calculeaza;
5•x+10•y+10•z


Răspuns :

x=3;
y+z=10;
5•x+10•y+10•z;
=5x+10(y+z);
=5•3+10•10;
=15+100;
=115;
5•x+10•y+10•z=
=5
·3+10(y+z)
=15+10·10
=15+100
=115