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(2/5)*x+6/5 = -4/5 // + -4/5
(2/5)*x+6/5-(-4/5) = 0
(2/5)*x+6/5+4/5 = 0
2/5*x+2 = 0 // - 2
2/5*x = -2 // : 2/5
x = -2/2/5
x = -5
x = -5
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