Question

Rezolvati inecuatia 4(a-9)mai mare sau egal 49 -1

Answer 1

4(a-9)>49-1
4a-36>48
4a> 48+36
4a>84
a>21
s=[ 21; plus infinit);

Answer 2

4(a-9)≥49-1
4a-36≥48
a-9≥12
a≥21
a∈N-{1,2,3,4...,20}