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Scrie sub forma de interval solutia innecuatiei 5x +7 < sau = 2

Răspuns :

5x+7≤2

5x+7-7≤2-7

5x≤2-7

5x≤-(7-2)

5x≤-5

5x:5≤-5:5

x≤-5:5

x≤-1

x € (-∞,-1]