Question

Daca micsoram de 4 ori a cincea parte dintr-un numar, rezultatul il marim de 10 ori si il micsoram cu 10, obtinem 60. Determinati numarul.

Answer 1

(a/5:4)*10-10=60
a/5*1/4*10-10=60
a/20*10=60+10
a/20=70;10
a/20=7
a=20*7
a=140
140/5:4*10-10=28:4*10-10=7*10-10=70-10=60 proba

Answer 2

(a:5:4)x10-10=60
(a:5:4)x10=60+10=70
a:5:4=70:10=7
a=7x4x5
a=140