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Help! Dau coroana!
1) x+4=0
2) 3x-12=0
3) 2(x+5)+15-9= 6(2x+1)


Răspuns :

AdinaDina
1) (mutam si schimbam semnele ) deci X= -4
2) 3X= 12 => X= 12: 3=> X= 4
3) 2X+ 10 + 6= 12X+ 6 => 2X+ 16= 12X+ 6 => 16-6=12X-2X=> 10= 10X => X= 10:10 => X= 1
Astridastrid789
1) X+4=0
   X=-4
2)3X-12=0
   3X=12
    X=4
3)2(X+5)+15-9=6(2X+1)
  2X+10+15-9=12X+6
 2X-12X=6+9-15-10
 -10X=-10
  X=1

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