SOLUTION: Solve the system by addition 2x-4y=7 4x+2y=9

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Question 44575: Solve the system by addition
2x-4y=7
4x+2y=9
Answer by venugopalramana(3286) About Me  (Show Source):
You can put this solution on YOUR website!
2x-4y=7......................I
4x+2y=9.................II
EQN.I+EQN.II*2
2X-4Y+8X+4Y=7+18=25
10X=25
X=25/10=2.5
4*2.5+2Y=9
2Y=9-10=-1
Y=-1/2=-0.5