Seudónimo Seudónimo

07-02-2021
Mathematics

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I need help on math:(

I need help on math class=

Respuesta :

majesticlizzy majesticlizzy

07-02-2021

Answer:

A. 10

Step-by-step explanation:

The perimeter is the sum of all the outside lengths

Therefore, to find the value of x, you must do:

x + x + 5 + x + 7 = 42

3x + 12 = 42

3x = 30

x =10

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