Question 466394
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 = {{{(-46)/23}}}
y = -2
Find x using the 1st equation
-2x - 8(-2) = 22
-2x + 16 = 22
-2x = 22 - 16
-2x = 6
x = {{{6/(-2)}}}
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