(2+2*2*2-2/2)*(20-2)=a-2/2

Răspuns :

(2+2*2*2-2/2)*(20-2)=a-2/2
(2+8-1)×18 = a-1
9×18 = a-1
162 = a-1
a = 162+1
a = 163
V. 162= 163-1