amardystern amardystern

29-10-2017
Mathematics

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One number is nine more than twice another. If their sum is decreased by ten, the result is eleven. Find the numbers.

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BradEagleCarp BradEagleCarp

07-11-2017

Another number: d
One number: 2d + 9

d + 2d + 9 - 10 = 11
3d - 1 = 11
3d = 12
d = 4

Another Number: 4
One Number: 17
2×4 + 9 = 8 + 9 = 17

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