jabeensethi59 jabeensethi59
  • 23-10-2018
  • Mathematics
contestada

2 numbers have a difftence of 0.7 and a sum of 1. what are the numbers?

Respuesta :

jcherry99
jcherry99 jcherry99
  • 24-10-2018

Answer:

x = 0.85; y = 0.15

Step-by-step explanation:

Let the larger number = x

Let the smaller number = y

Equations

x + y = 1

x - y = 0.7    

Solution

Find x

Add the equations together.

x + x = 1 + 0.7    Combine like terms.  

2x = 1.7              Divide both sides by 2

2x/2 = 1.7/2

x = 0.85

Find y

x + y = 1         Substitute for x

0.85 + y = 1   Subtract 0.85 from both sides

0.85 - 0.85 + y = 1 - 0.85

y = 0.15


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