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3 years ago

The sum of two numbers is twice their difference. the larger number is 9 more than twice the smaller. find the numbers.

Mathematics

1 answer:

melomori [17]3 years ago

5 0

small number = x and large number = 2x + 9

x + 2x + 9 = 2(2x + 9 - x)

3x + 9 = 2x + 18

x= 9

2(9) + 9 = 27

Small number = 9 and large number = 27

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2 years ago

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Students are given 3 minutes to complete each multiple-choice question on a test and 8 minutes for each free-response question.

SpyIntel [72]

Let

x------> the number of multiple choice question

y------> the number of free response question

we know that

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$x+y=15$

$x=15-y$ -----> equation B

Substitute equation B in equation A

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the number of free response question are $2$

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