Răspunsuri

2014-06-16T15:52:46+03:00
28:4=7

39-(3a-7)*6+11=26

50 -(3a-7)*6=26

-(3a-7)*6= 26-50

-(3a-7)*6= -24

(3a-7)*6 =24

3a-7=24:6

3a-7=4

3a=4+7

3a=11

a= 11/3