Question

Реши уравнения : × + 7 = 45 ; × - 7 = 38 ;45 - × = 7

Answer 1

 × + 7 = 45; х=45-7; х=38

 × - 7 = 38; х=38+7; х=45

45 - × = 7; -х=7-45; х=38