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(4/5)*x+(6/5)*x = -2/5 // + -2/5
(4/5)*x+(6/5)*x-(-2/5) = 0
(4/5)*x+(6/5)*x+2/5 = 0
2*x+2/5 = 0 // - 2/5
2*x = -2/5 // : 2
x = -2/5/2
x = -1/5
x = -1/5
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