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(1/3)*x+5*x-3/5 = -89/15 // + -89/15
(1/3)*x+5*x-3/5-(-89/15) = 0
(1/3)*x+5*x-3/5+89/15 = 0
16/3*x+16/3 = 0 // - 16/3
16/3*x = -16/3 // : 16/3
x = -16/3/16/3
x = -1
x = -1
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