alanad26 alanad26

15-10-2020
Mathematics

contestada

Find x if the perimeter of a rectangle is 140. The rectangle has a length of 5x and a width of 4x-2.

Respuesta :

babemidehade babemidehade

15-10-2020

Answer:

x=8

Step-by-step explanation:

p=(l+b)

140=2(x+4x-2)

140=2(9x-2)

140=18x-4

140+4=18x

144=18x

144/18=x

8=x

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