1) (x - 8) * 12 = 132;

x - 8 = 132 : 12;

x - 8 = 11;

x = 11 + 8;

x = 19;

2) 84 : x + 5 = 17;

84 : x = 17 - 5;

84 : x = 12;

x = 84 : 12;

x = 7.