One number is eight more than twice another. If their difference is 25, what is the larger number?

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12-02-2017
Mathematics

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One number is eight more than twice another. If their difference is 25, what is the larger number?

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trombonebookworm trombonebookworm · Answer 1 · 2017-02-12T18:51:09+01:00

trombonebookworm trombonebookworm

12-02-2017

You can set up an system of equations
x=2y+8
x-y=25

Substitute x in to the second equation
2y+8-y=25
y+8=25
y=17

Substitute the y back in to the first equation.
x=2(17)+8=42

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