23-08-2017
Mathematics

contestada

if 5(3x-7)=20, then what is 6x-8 ?

Respuesta :

trishinada63 trishinada63

23-08-2017

First solve for x in the first equation. So you'll have to substitute,
5(3x-7)=20
15x-35=20
Then add 35 to both sides.
15x=55
Divide 55 by 15.
So x = 3.66...
Then plug in 3.7 for x in 6x-8
6(3.7)-8
Its approximately 14.2

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