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4-((2*x)/3) = -8 // + 8
4-((2*x)/3)+8 = 0
(-2/3)*x+4+8 = 0
12-2/3*x = 0 // - 12
-2/3*x = -12 // : -2/3
x = -12/(-2/3)
x = 18
x = 18
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