Răspunsuri

2014-10-06T08:39:14+03:00
A)x-2<5,x<7,x apartine{,1,2,3,4,5,6,}
b)21<x-1<23
21<x-1,22<x,xapartine{22,..+.}
x-1<23,x<24,xapartine{0,....23}
x-1=21,x=22