SOLUTION: Solve using the elimination method 1. -2x – 8y = 22 -6x – y = 20 2. x + 8y = 14 -3x + 4y = 0 3. 9x – 7y = -120.5 -36x + 28y = -482 Thank You So Much For Yo

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Solve using the elimination method 1. -2x – 8y = 22 -6x – y = 20 2. x + 8y = 14 -3x + 4y = 0 3. 9x – 7y = -120.5 -36x + 28y = -482 Thank You So Much For Yo      Log On


   

Question 466394: Solve using the elimination method

1. -2x – 8y = 22 -6x – y = 20
2. x + 8y = 14 -3x + 4y = 0
3. 9x – 7y = -120.5 -36x + 28y = -482
Thank You So Much For Your Help!

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Solve using the elimination method
1.
-2x – 8y = 22
-6x – y = 20
Multiply the 1st equation by -3:
+6x + 24y = -66
-6x - y = 20
------------------adding eliminates x find y
23y = -46
y = %28-46%29%2F23
y = -2
Find x using the 1st equation
-2x - 8(-2) = 22
-2x + 16 = 22
-2x = 22 - 16
-2x = 6
x = 6%2F%28-2%29
x = -3
Check solutions in the 2nd equation
-6x - y = 20
-6(-3) - (-2) =
+18 + 2 = 20
:
:
2.
x + 8y = 14
-3x + 4y = 0
multiply the 1st equation by 3, do it the same way we did the 1st one
:
:
3.
9x – 7y = -120.5
-36x + 28y = -482
multiply the 1st equation by 4
+36x - 28y = -482
-36x + 28y = -482
these lines are parallel. No solution