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((3/10)*x^1)/5 = 4/5 // - 4/5
((3/10)*x^1)/5-(4/5) = 0
((3/10)*x)/5-4/5 = 0
3/50*x-4/5 = 0 // + 4/5
3/50*x = 4/5 // : 3/50
x = 4/5/3/50
x = 40/3
x = 40/3
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