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Aflati numarul natural x daca:
a)x+24=68
x-15+21=149
x-79>285
x=4387<75018

b) x:52>8
x:3<55
x:(69+6-38)=52
(27x10+8):x2=2

c) xx2<3874
xx7<406
xx(95-15x6+5)=21070
(785:5-3x28)xx=132