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9/2 = 4*x-(7*x)+6 // - 4*x-(7*x)+6
7*x-(4*x)+9/2-6 = 0
7*x-4*x+9/2-6 = 0
3*x-3/2 = 0 // + 3/2
3*x = 3/2 // : 3
x = 3/2/3
x = 1/2
x = 1/2
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