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(8/3)*x+9 = 6-12*x // - 6-12*x
(8/3)*x-(-12*x)-6+9 = 0
(8/3)*x+12*x-6+9 = 0
44/3*x+3 = 0 // - 3
44/3*x = -3 // : 44/3
x = -3/44/3
x = -9/44
x = -9/44
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