Помогите решить уравнение 138-(70+x)÷3=68
138 - (70 + х) : 3 = 68 (70 + х) : 3 = 138 - 68 (70 + х) : 3 = 70 70 + х = 70 * 3 70 + х = 210 х = 210 - 70 х = 140 ---------------------------- Проверка: 138 - (70 + 140) : 3 = 68 138 - 210 : 3 = 68 138 - 70 = 68 68 = 68
138-(70+x)/3=68 (70+x)/3=138-68 (70+x)/3=70 70+x=3*70 70+x=210 x=210-70 x=140