а) 2x = 1/2
x = 1/2:2 = 1/2*1/2 = 1/4
б) 3x = -1/4
x = -1/4:3 = -1/4*1/3 = -1/12
в) -2x = 1/4
x = 1/4:(-2) = -1/4*1/2 = -1/8
г) 1/2x = 3
x = 3:1/2 = 3*2 = 6
д) 3/4x = 1
x = 1:3/4 = 1*4/3 = 4/3 = 1 1/3
е) -1/3x = -3
x = (-3):(-1/3) = 3*3 = 9
ж) -2/7x = 0
x = 0
з) -4x = 8/25
x = 8/25:(-4) = -8/25*1/4 = -2/25
и) 2x = 1 1/3 = 4/3
x = 4/3:2 = 4/3*1/2 = 2/3