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70 = 9-((2/3)*x) // - 9-((2/3)*x)
(2/3)*x-9+70 = 0
2/3*x+61 = 0 // - 61
2/3*x = -61 // : 2/3
x = -61/2/3
x = -183/2
x = -183/2
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