Ajutor.A) x-1/2-3=7/2(x+3)
B)2+x-1/2=(-1/3)²-0,25,
Ps raspunsul la a trebuie sa fie -14/3 si la b -14/18

1
Acum e corect. Scrie-l si pe B la fel.
B) 2+[(x-1)/2]=(-1/3)²-0,25
Si poti sa imi areti si c ?
C)X+(1/2)=2(1-x)
Gata!

Răspunsuri

2014-08-03T15:26:39+03:00
A)
x-7=7x+21A)
\frac{x-1}{2}-3= \frac{7}{2}(x+3)
Aducem ecuatia la acelasi numitor
x-1-6=7(x+3)

x-7 = 7x+21
x-7x = 21+7
-6x=28
x= \frac{28}{-6}=- \frac{14}{3}

B)
 2+[(x-1)/2]=(-1/3)²-0,25
2+ \frac{x-1}{2}= \frac{1}{9}- \frac{1}{4}
Aducem la acelasi numitor
72 +  18(x - 1)= 4 - 9
18(x - 1) = 4 - 9 - 72
18x - 18 = -73
18x = 18 - 73 
18x = -55
x = -55/18



C)
x+(1/2)=2(1-x)
2x +1 = 4 - 4x
6x = 3
x = 3/6 = 1 / 2