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5.Rezolvati in Q ecuatiile.
a)7x-7=2x+21
c)0,7z+4=1,2z-3,5
d)2x-4,53=0,9x-3,32
e)(1-2x):3=(x+2):2
f)2t-4 supra 2=0,1 ori(10 t-20)
6 Rezolvati in R:
e)z √2-z=1+√2
f)u√6+√5=u√3+√10


Răspuns :

7x-7=2x+21
c)0,7z+4=1,2z-3,5
d)2x-4,53=0,9x-3,32
Vezi imaginea KERY00