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8*x-((8/7)*((4/3)*x-12)) = 0
(-8/7)*((4/3)*x-12)+8*x = 0
8*x-8/7*(4/3*x-12) = 0
8*x-8/7*(4/3*x-12) = 0
136/21*x+96/7 = 0
136/21*x+96/7 = 0
136/21*x+96/7 = 0 // - 96/7
136/21*x = -96/7 // : 136/21
x = -96/7/136/21
x = -36/17
x = -36/17
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