2/3x - 3/2x = 5/12
=> ( 2/3 - 3/2 )x = 5/12
=> -5/6x = 5/12
=> x = 5/12 : -5/6
=> x = -1/2
( x + 1/2 ) . ( 2/3 - 2x ) = 0
=> x + 1/2 = 0 hoặc 2/3 - 2x = 0
=> x = -1/2 hoặc x = 1/3
3y + 1/4 = 2y - 3/5
=> 3y + 2y = 1/4 - 3/5
=> 5y = -7/20
=> y = -7/20 : 5
=> y = -7/100