crystalegiles crystalegiles

05-11-2014
Mathematics

Answered

a number is doubled and then decreased by 13. the result is 61. what is the ordinal number?

Answer :

giftdom giftdom

05-11-2014

i would use the inverse operation.
61 divided by 2 plus 13 equals 43.5

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emmanuelkumi emmanuelkumi

05-11-2014

let x be the number
x + x - 13 = 61
2x - 13 = 61
2x = 61 + 13
2x = 74
2x/2 = 74/2
x = 37

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