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(1/5)*x-5 = -103/20 // + -103/20
(1/5)*x-(-103/20)-5 = 0
(1/5)*x+103/20-5 = 0
1/5*x+3/20 = 0 // - 3/20
1/5*x = -3/20 // : 1/5
x = -3/20/1/5
x = -3/4
x = -3/4
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