Question

Aflati multimea solutiilor comune ale inecuatiilor: 2x+5>7 si 7x-2< sau =26

Answer 1

2x+5 >7
2x>7-5
2x>2
x>2:2
x>1
x∈{1,2,3,4,5,6,....}

7x-2≤26
7x≤26+2
7x≤28
x≤28:7
x≤4
x∈{0,1,2,3,4}
multimea solutiilor comune este {1,2,3,4}