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12-((4*x)/3) = 3/6 // - 3/6
12-((4*x)/3)-(3/6) = 0
(-4/3)*x-1/2+12 = 0
23/2-4/3*x = 0 // - 23/2
-4/3*x = -23/2 // : -4/3
x = -23/2/(-4/3)
x = 69/8
x = 69/8
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