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Supposing that "Four-fifths of a number minus two is greater than three-tenths of twice that number," find the number.
(4/5)x - 2 > (3/10)(2x)
Mult. all terms by 10 to elim. fractions:
8x - 20 > 6x
Then 2x = 20, and x = 10. Your answer should be x > 10. It's essential that you check this result, however, just in case the answer is x < 10.