Răspuns :
7×(2x-1)< sau egal 49
2x -1 < sau egal 49÷7
1) x= 1 => 2-1< sau egal decat 7
2) x=2=> 4-13) x=3 => 6-1 4) x=4 => 8-1 < sau egal decat 7
2x -1 < sau egal 49÷7
1) x= 1 => 2-1< sau egal decat 7
2) x=2=> 4-13) x=3 => 6-1 4) x=4 => 8-1 < sau egal decat 7