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Rezolvati inecuatiile:

a) |2x + 5| = 9 b) 2|2x - 3| - 5 = 9


Răspuns :

a) |2x+5|=9
2x+5=9
2x=9-5
2x=4 /:2
x=2

b)2*|2x-3|-5=9
2*2x-2*3-5=9
4x-6-5=9
4x=9+6+5
4x=20 /:4
x=5