Răspunsuri

2014-08-03T20:17:07+03:00
A)(x-1)/2 -3= 7(x+3)/2   aducem la acelasi numitor

x-1 -6=7x+21

x-7=7x +21

x-7x =21+7

-6x =28

x= - 28/6= -14/3

b)2+(x-1)/2= 1/9 -25/100

2+(x-1)/2=1/9 -1/4   aducem la acelasi numitor

72+18x-18=4-9

18x+54=-5

18x= -5-54

18x= -59

x= -59/18

c)x+1/2=2-2x   aducem la acelasi numitor

2x+1=4-4x

2x+4x=4-1

6x=3

x= 3/6=1/2