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

2 answers:

8 0

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)

mash [69]2 years ago

5 0

4(-5y) + 2y = 180

-20y + 2y = 180

-18y = 180

y = -10
x = 50

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