SOLUTION: Solve by elimination... 3x-y=21 2x+y=4

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Question 51106: Solve by elimination...
3x-y=21
2x+y=4
Answer by Thanenjayan(7) About Me  (Show Source):
You can put this solution on YOUR website!
3x-y=21 ----- 1
2x+y=4 ------ 2

(1)+(2)=> 5x = 25
x = 5

substitude x=5 in (2)
2*(5)+y = 4
y = 4-10
y = -6