Jellieroll2000 Jellieroll2000

09-12-2014
Mathematics

contestada

When 8 is subtracted from Ollie’s age, the result is the same as subtracting 16 from 3 times his age.

How old is Ollie?

years

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apologiabiology apologiabiology

09-12-2014

so
ollie=x

x-8=y
y=3x-16

subsitute y=3x-16 for y in the first equation so

x-8=3x-16
subtract x from both sides
-8=2x-16
add 16 to both sides
8=2x
divide both sides by 2
4=x
ollie is 4

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