Răspunsuri

2014-11-06T20:45:06+02:00
25340-43121+x=11 
x=11-25340+43121
x=17792

4520-(x+2790-18)=1
4520-x-2790+18=1
1748-x=1
1748+1=x
x=1749
1 5 1