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6*x+9 = (1/2)*x+199/16 // - (1/2)*x+199/16
6*x-((1/2)*x)-(199/16)+9 = 0
6*x+(-1/2)*x-199/16+9 = 0
11/2*x-55/16 = 0 // + 55/16
11/2*x = 55/16 // : 11/2
x = 55/16/11/2
x = 5/8
x = 5/8
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