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(-2/3)*x-9 = 3*x-(74/7) // - 3*x-(74/7)
(-2/3)*x-(3*x)+74/7-9 = 0
(-2/3)*x-3*x+74/7-9 = 0
11/7-11/3*x = 0 // - 11/7
-11/3*x = -11/7 // : -11/3
x = -11/7/(-11/3)
x = 3/7
x = 3/7
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