7+7÷7×7-(3×30-3×10)÷10=

Răspuns :

7+1×7-(90-30):10=
=7+7-60:10=
=7+7-6=
=14-6=
=8
7+7÷7×7-(3×30-3×10)÷10=
=7+1×7-(90-30):10=
=7+7-60:10=
=14-6=
=8