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4*x+3/10 = 323/10 // - 323/10
4*x+3/10-(323/10) = 0
4*x+3/10-323/10 = 0
4*x-32 = 0 // + 32
4*x = 32 // : 4
x = 32/4
x = 8
x = 8
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