djmickey4life djmickey4life
  • 11-10-2017
  • Mathematics
contestada

Solve the system by the elimination method. 2x + y - 4 = 0 , 2x - y - 4 = 0

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texaschic101
texaschic101 texaschic101
  • 11-10-2017
2x + y - 4 = 0.....2x + y = 4
2x - y - 4 = 0.....2x - y = 4

2x + y = 4
2x - y = 4
--------------add
4x = 8
x = 8/4
x = 2

2x + y = 4
2(2) + y = 4
4 + y = 4
y = 4 - 4
y = 0

solution is (2,0)
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