ПОМОГИТЕ РЕШИТЬ ПЖ (-3/14-8/21):20/21
(-3/14-8/21):20/21= - 5/8 1) - 3/14 - 8/21 = -9/42 - 16/42 = - 25/42 2) - 25/42 : 20/21 = - 25/42 * 21/20 =525/840= - 5/8
спс ))
:)