Question 1012439: (1).2x+3y=4
4x-3y=8
(2). x=3y-1
x+2y=9
(3). y=x+3
y=2x
(4). 3x-2y=10
2x+3y=-2
3
(5). y=2x-5
4x-y=7
choose substitution or elimination t solve the system of equations and check
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! 2x+3y=4
4x-3y=8
-4x-6y=-8
-9y-0, y=0, x=2
(2,0)
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x=3y-1
x+2y=9
3y-1+2y=9
5y=10, y=2, x=5
(5,2)
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y=x+3
y=2x
2x=x+3
x=3 y=6
(3,6)
============
3x-2y=10
2x+3y= -2
6x-4y=20, multiply top by 2
-6x-9y=6, multiply bottom by -3
-13y=26
y=-2, x=2
(2,-2)
============
y=2x-5
4x-y=7
4x-2x+5=7 by substitution
2x=2
x=1
y=-3
(1,-3)
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