a) x : 4 = 8
x = 8 × 4
x = 32
b) 4 × x = 12 + 8
4 × x = 20
x = 20 : 4
x = 5
c) 30 : x = 14 + 16
30 : x = 30
x = 30 : 30
x = 1
A. 124; 333; 262; 290; 754; 976
B. 976; 754; 333; 290; 262; 124
C. 124; 262; 290; 333; 754; 976
D. 124; 333; 290; 262; 754; 976