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Ierofanga [76]
3 years ago
14

If the perimeter of the following triangle is 7x-2, what is the length of the unknown side?

Mathematics
1 answer:
Alinara [238K]3 years ago
4 0

7x-2-(3x-9)-(x+7)

=7x-2-3x+9-x-7

=7x-3x-x-2+9-7

=3x

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