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Rezolvati ecuatiile -6+5x=0,-3x+2=0,-9x+18=0,5c-20=0,

Răspuns :

16+5x=0
85x=6
x= [tex] \frac{6}{5} [/tex]
 
-3x+2=0 
-3x=2  
x=2 ori 3
x=6 

-9x+18=0
-9x=18
x=18:9
x=2

5c-20=0
5c=20
c=20:5
c=4