lena4042 lena4042
  • 02-11-2019
  • Mathematics
contestada

twice the difference of a number and 9 is 7​

Respuesta :

Jessicaalvarez2006 Jessicaalvarez2006
  • 02-11-2019
(x-9)^2=7
“twice the difference of a number” would mean x-9 twice equals 7
Answer Link
ujalakhan18
ujalakhan18 ujalakhan18
  • 02-11-2019

Answer:

x=12.5

Step-by-step explanation:

Let the number be x

2(x-9)=7

2x-18=7

2x=7+18

2x=25

x=25/2

x=12.5

Answer Link

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