nooneneedstoknow1234 nooneneedstoknow1234
  • 12-02-2022
  • Mathematics
contestada

find two numbers if their sum is 7.2 and their difference is 2.7

Respuesta :

giadanguyen
giadanguyen giadanguyen
  • 12-02-2022

Answer:

4.95 and 2.25

Step-by-step explanation:

x+y=7.2

x-y=2.7

Add equations

x+y + x-y= (2x-y+y)=2x

7.2+2.7=9.9

Therefore 2x=9.9 x=9.9/2=4.95

x=4.95

x+y=7.2

4.95+y=7.2

y=7.2-4.95=2.25

y=2.25

Answer Link
mhijlife mhijlife
  • 12-02-2022

Answer:

4.95 and 2.25.

Step-by-step explanation: This is really long... (PLEASE TAKE NOTE THE INFO ISNT DIRECTLY WRITTEN BY ME).


Adding equations (1) and (2), we get

Therefore

x=4.95


Substituting value of x from (3) in (1), we get


y=2.25


From (3) and (4), the two numbers are 4.95 and 2.25.

Answer Link

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