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a fost răspuns

Rezolvati in Q ecuatiile a)4x-3=0 b)2-5x=12 c)3 supra 4x-2=7 d) -2 intrreg 1 supra 2 x=x+5 intreg 1 supra 4 e) 2,25-3,2 x=3,5x-2,2x-1,25 f) 0,1(6)x-4,(6)=-1-x g) 0,08(3)x-2=9-0,8(3)x

Răspuns :

Edith12
a)4x=0+3=>4x=3=>4/3=>x=1,(3)
b) -5x=12-2=>-5x=10=>10/(-5)=>x=-2
e)225 supra 100-32xsupra 10=35x supra 10-22xsupra10-125 supra 100.
n.c.=100=>amplificam fiecare fractie cu 100=>22500-3200x=3500x-2200x-12500=>3200x-3500x+2200x=12500-22500=>1900x=-10000=>-10000/1900=>x=-5,263
f)5x  supra 90-42 supra 9=-1-x=>n.c.=90=>amplificam fiecare numar cu 90=> 5x-420=-90-90x=>5x+90x=-90+420=>95x=330=>x=330/95=>x=3,473
g)75x supra 900-2=9-75x supra90=>n.c.=900=>amplificam fiecare fractie cu 900=>75x1800=8100-750x=>75x+750x=8100+1800=>825x=9900=>x=9900/825=>x=12

/=impartire
c si d nu le-am stiut
dar te-am ajutat cu celelalte care sunt 100% corecte

imi dai coroana????