Question

determinati nr naturale x stiind ca:30>(10+x)*2-3>20

Answer 1

30>(10+x)*2-3>20
30+3>(10+x)*2>20+3
33>(10+x)*2>23
33÷2>10+x>23÷2
16.5>10+x>11.5
16.5-10>x>11.5-10
6.5>x>1.5 => x apartine multimii formate din elementele {6, 5, 4, 3, 2}