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Rezolvati urmatoarele ecuatii :
x+1 =7,x apartine N
2)t-2=-3,t apartine Z
3)3,25 +a=1,9,a apartine Q


Răspuns :

x+1=7
x= -1+7
x=6 apartine N

t-2=-3
t=+2-3
t=-1 apartine Z

3,25+a=1,9
a=-3,25+1,9
a=-1,35 apartine Q