Răspunsuri

2014-11-09T11:30:56+02:00
90=14x-8
90+8=14x
98=14x
98:14=x
7=x

5+8a=21+4a
8a-4a=21-5
4a=16
a=16:4=4



la urmatorul 21+108a=93 , 108a=93-21
108a=72 ,a=108:72=1,5