Răspunsuri

2014-10-10T14:00:00+03:00
111+2x+29= 1000
2x= 111+29-1000
2x= -860
x= -430.

9+2(14-y) = 15
9+24-2y=15
33-2y=15
2y=15-33
2y= -18
y= -9

5x+52-31= 900-19
5x+20 = 887
5x= 887-20
5x= 867
x= 173,4