1 / 3x - 2 / 5 = 2 / 3(4 / 5x + 1 / 3)
1 / 3x - 2 / 5 = 2 / 3• 4 / 5x + 2 / 3• 1 / 3
1 / 3x - 2 / 5 = 8 / 15x + 2 / 9
8 / 15x - 1 / 3x = - 2 / 5 - 2 / 9
8 / 15x - (1•5) / (3•5)x = - (2•9) / (5•9) - (2•5) / (9•5)
8 / 15x - 5 / 15x = - 18 / 45 - 10 / 45
3 / 15x = - (18 + 10) / 45
3 / 15x = - 28 / 45
X = - 28 / 45 : 3 / 15
X = - 28 / 45• 15 / 3
X = - 28 / 3• 1 / 3
X = - 28 / 9
X = - 3 1 / 9
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1 / 3x - 2 / 5 = 2 / 3(4 / 5x + 1 / 3)
1 / 3• ( - 3 1 / 9) - 2 / 5 = 2 / 3• (4 / 5• ( - 3 1 / 9) + 1 / 3)
1 / 3• ( - 28 / 9) - 2 / 5 = 2 / 3• (4 / 5• ( - 28 / 9) + 1 / 3) - 28 / 27 - 2 / 5 = 2 / 3• ( ( - 112 / 45) + 1 / 3) - (28•5) / (27•5) - (2•27) / (5•27) =
2 / 3• ( - 112 / 45 + (1•15) / (3•15) ) - 140 / 135 - 54 / 135 = 2 / 3• ( - 112 / 45 + 15 / 45) - 194 / 135 = 2 / 3• ( - 97 / 45) - 194 / 135 = - 194 / 135 - 1 59 / 135 = - 1 59 / 135.