Реши уравнения 180-x=100. x-17=40. x+24=50
180-×=100 ×=80 ×-17=40 ×=57 ×+24=50 х=26
180-x=100. x-17=40 x+24=50 x=180-100. x=40+17. x=50-24 x=80. x=57. x=26