Question 309731: i need help solving each system of equations:
1) 2x-y=20
3x+2y=-19
2) x+y=12
2x+y=6
3)y=x+3
-2x+y=-4
4) 4x+y=10
-2x-y=4
5) 2x+y=8
3x+5y=5
Answer by sayanchakroborty@ymail.com(1)   (Show Source):
You can put this solution on YOUR website! 1)2x-y=20
3x+2y=-19
ans: 2x-y=20
or,6x-3y=60............(1)
3x+2y=-19
or,6x+4y=-38............(2)
6x-3y=60
6x+4y=-38
(-) (-)=(+)
------------------
-7y=98
98
or,y=--
. -7
. .y=-14
put y to the ftrst eqution.
6x-3(-14)=60
or,6x+42=60
or,6x=60-42
or,6x=18 x=6
or,x=18/6 y=-7
or,x=6
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