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Joyeria28 Joyeria28
  • 20-04-2015
  • Mathematics
Answered

Hello, I need help solving the system of equations by substitution method.


Thanks,


4x+2y=108

x=-5y

Verified Answer :

Crinckle Crinckle
  • 20-04-2015

4(-5y) + 2y = 180

-20y + 2y = 180

-18y = 180

y = -10
x = 50

Answer Link
Panoyin
Panoyin Panoyin
  • 20-04-2015

4x + 2y = 108
x = -5y

4(-5y) + 2y = 108
-20y + 2y = 108
-18x = 108
 -18     -18
     x = 6
4(6) + 2y = 108
  24 + 2y = 108
- 24           - 24
           2y = 84
            2      2
             y = 41
        (x, y) = (6, 41)

Answer Link

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