( 1/4: 3/4x-1/2)+2/5=1/2
( 1/4 : 3/4x - 1/2 ) + 2/5 = 1/2 1/4 : 3/4x - 1/2 = 1/2 - 2/5 1/4 : 3/4x - 1/2 = 5/10 - 4/10 1/4 : 3/4x = 1/10 + 5/10 1/4 : 3/4x = 3/5 3/4x = 1/4 : 3/5 3/4x = 5/12 X = 5/12 : 3/4 X = 5/9