Реши уравнения.
1) Устно.
x + 16 = 16
48 − x = 48
x − 27 = 0
2) Письменно.
x − 23 = 34
57 − x = 20
56 : x = 8
x + 16 = 16
x = 0
48 − x = 48
x = 0
x − 27 = 0
x = 27
x − 23 = 34
x = 34 + 23
x = 57
57 − x = 20
x = 57 − 20
x = 37
56 : x = 8
x = 56 : 8
x = 7