14 - x = 6
14 - 6 = x
x = 8
x + 11 = 27
x = 27 - 11
x = 16
7x = 63
x = 63 / 7
x = 9
48 : x = 8
48 / 8 = x
x = 6
Ответ: 1) x = 8; 2) x = 16; 3) x = 9; 4) x = 6