a) x :13 = 41
=> x = 41 . 13 = 533
1428 : x = 14
=> x = 1428 : 14 = 102
4x : 17 = 0
4x = 0 . 17
4x = 0
=> x = 0 : 4
x = 0
7x- 8 = 713
7x = 713 + 8
7x = 721
=> x = 721 : 7
x = 103
8( x - 3 ) 0
=> ( x - 3 ) = 0: 8
( x - 3 ) = 0
=> x = 0+ 3 = 3
g) 0 : x =0
=> x = 0 : 0
x = 0