Question

Va rog frumosma puteti ajuta la urmatorul ex:12×{55+7[21-3×(7×3-20)]-165}+2448:6=................Va rog ajutati-ma!

Answer 1

12×{55+7[21-3×(7×3-20)]-165}+2448:6=
=12×{55+7[21-3×(21-20)]-165}+408=
=12×[55+7(21-3×1)-165]+408=
=12×(55+7×18-165)+408=
=12×(55+126-165)+408=
=12×(181-165)+408=
=12×16+408=
=192+408=600