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(-2/3)*x-(9/5) = -9/4 // + -9/4
(-2/3)*x-(9/5)-(-9/4) = 0
(-2/3)*x-9/5+9/4 = 0
9/20-2/3*x = 0 // - 9/20
-2/3*x = -9/20 // : -2/3
x = -9/20/(-2/3)
x = 27/40
x = 27/40
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