calculeaza:6+(15-(8:ax7+7))x5=11

Răspuns :

6+(15-(8:ax7+7))x5=11
(15-(8:ax7+7))x5=11-6
(15-(8:ax7+7))x5=5
15-(8:ax7+7)=1
8:ax7+7=14
8:ax7=7
8:a=1
a=8