Răspunsuri

2014-08-06T22:48:18+03:00
1)101 -11 -105+9=

= 110 -116 = -6

2)|x-2|=7

x-2= 7   x-2=  -7
x= 9         x= -5

x={-5;9}

3)x-pretul initial

20% din x=20/100 *x=  1/5 *x=  x/5 -scumpirea

x+x/5=  (5x+x)/5=  6x/5 -noul pret

6x/5=240

x=5*240/6

x=5*40=200
2 5 2