Răspuns :
95-(25+ax6-40)x2=90
95-(25+ax6-40)=90:2=45
25+ax6-40=45+90=135
25+ax6=135+40=175
ax6=175-25=150
a=150:6
a=25
95-(25+ax6-40)=90:2=45
25+ax6-40=45+90=135
25+ax6=135+40=175
ax6=175-25=150
a=150:6
a=25