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5*x-(2/5) = -49/10 // + -49/10
5*x-(2/5)-(-49/10) = 0
5*x-2/5+49/10 = 0
5*x+9/2 = 0 // - 9/2
5*x = -9/2 // : 5
x = -9/2/5
x = -9/10
x = -9/10
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