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ofer coroana +15 puncte
rezolvati ecoatile :
a)x+x+x=6
b)3*x+4=2*x+11
c)2*(x+3)=6
*=ori (inmultire)


Răspuns :

a) 3x=6; x=2
b) 3x+4=2x+11; x=7
c)2(x+3)=6; x+3=3; x=0
a)
x+x+x=6
3x=6
x=6:3
x=2
b)
3x+4=2x+11
3x-2x=11-4
x=7
c)
2(x+3)=6
2x+6=6
2x=6-6
2x=0
x=0:2
x=0