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3/5x = x-4
3x= 5(x-4)
3x=5x-20
20= 2x
x= 20/2= 10
3/5x - x = -4
-2/5x = -4
x = -4 x (-5/2)
x = 10
2. 2/3x - 5 = x x 1/4
2/3x - 5 = 1/4x
2/3x - 1/4x = 5
8/12x - 3/12x = 5
5/12x = 5
x = 5 x 12/5
x = 12
3. x x 1/3 = x - 6
1/3x = x - 6
1/3x - x = -6
-2/3x = -6
x = -6 x (-3/2)
x = 9