2/3 ( a -5 ) - 1/4 ( a -2 ) = 9/2
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2/3 ( a -5 ) - 1/4 ( a -2 ) = 9/2
2a/3 - 10/3 - a/4 + 1/2 = 9/2
2a/3 - a/4 - 10/3 +1/2 = 9/2
(8a-3a)/12 - (20 - 3) /6 = 9/2
5a/12 - 17/6 =9/2
5a/12 = 9/2 + 17/6
5a/12 = (27 + 17)/6
5a/2 = 44
5a = 88
a = 88/5
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