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rezolvati inecutia 5x +2 _<7 in multimea nr naturale

Răspuns :

5x≤7-2

5x≤5

x≤5:5

x≤1
x
∈[0,1]
5×≈≤7-2⇔5×≈5⇔×≈5÷5≈1⇔×≤1