1/3(33x +15) - 1/3 ( 21x +18) =10
¹/₃(33x + 15) - ¹/₃(21x + 18) = 10¹/₃(33x) + ¹/₃(15) - ¹/₃(21x) - ¹/₃(18) = 10 11x + 5 - 7x - 6 = 10 11x - 7x + 5 - 6 = 10 4x - 1 = 10 + 1 + 1 4x = 11 4 4 x = 3³/₄