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(-4/5)*x+9 = 38/5-(3*x) // - 38/5-(3*x)
(-4/5)*x+3*x-(38/5)+9 = 0
(-4/5)*x+3*x-38/5+9 = 0
11/5*x+7/5 = 0 // - 7/5
11/5*x = -7/5 // : 11/5
x = -7/5/11/5
x = -7/11
x = -7/11
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