Ashopper paid $100 for a coat that was on sale for 20%. how much was the original price of the coat?

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Which expression is equivalent to 5r6141 2r+st6

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.