Răspuns :
a÷5×4=8
a=8÷4=2⇒a÷5=2⇒a=2×5=10
a=10
Verificare: (10÷5)×4=2×4=8
Mult noroc!
a=8÷4=2⇒a÷5=2⇒a=2×5=10
a=10
Verificare: (10÷5)×4=2×4=8
Mult noroc!