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Rezolvati ecuatia : l -2,x+2l - 4=16

Răspuns :

l-2x+2l-4=16

l-2x+2l=20

cazul 1:

-2x+2=20

-2x=18

-x=9

x= -9

cazul 2:

-2x+2= -20

-2x= -22

2x=22

x=11