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Daca X+2Y=17 si Y- 3Z =4 calculati:

a) X+3Y-3Z

b) 2X+5Y-3Z

c) ( 3X+6Y)+(2Y-6Z)

d) (2X+4Y)*(X+4Y)*(X+4Y-6Z)


Răspuns :

a) 17+4=21
b) 2×17+4=38
c) 3×17+2×4=59
d) (2×17)×(X+4Y)×(17+2×4)
verifica:al doilea termen X+4Y