2 years ago

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

Mathematics

1 answer:

Alinara [238K]2 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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Step-by-step explanation:

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