Răspunsuri

2014-03-30T09:39:58+03:00
4<7*8-9*6+3(8-a)<6
4<56-54+24-3a<6
4<26-3a<6 / -26
-22<-3a<-20 /*(-1)
22>3a>20 /:3
 \frac{22}{3} >a >    \frac{20}{3}