If the product of twice a number decreased by five and five times a number increased by seven is zero; find the numbers.?
回答 (1)
2017-02-22 6:39 am
[2x - 5] [ 5x + 7] = 0
x = 5/2 , x = - 7/5
x = 5/2 , x = - 7/5
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