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

Answer :

Crinckle Crinckle

20-04-2015

4(-5y) + 2y = 180

-20y + 2y = 180

-18y = 180

y = -10
x = 50

Answer Link

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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