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rezolvați ecuatia 18:[(5^2-5x)•2-11]=2

Răspuns :

(25-5x)*2-11=18:2
50-10x=9+11
-10x=20-50
-10x=-30 (-1)
x=30:10
x=3
rezolvare:
(25-5x)x2-11=18:2
50-10x=9+11
50-10x=20
50-20=10x
30=10x
x=3