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rezolvati inecoatia 4(5x + 19x - 17x)< 84




Răspuns :

imparti la 4 si ai
7x<21
deci x poate fi 2, 1, 0
20x+76x-68x<84
28x<84
x<84/28
x<3
S:{2,1,0,-1,-2,-3.......}