Question 585183: 0.3x-0.2y=4
0.5x+0.5y=-45/17
3x-2y=40
5x+5y=-450/17
15x-10y=200
15x-15y=1350/17
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-25y= 4750/17 dont know how they got this?
y=-190/17
3x-2(-190/17)=40
100/17
Solution 100/17,-190/17 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! 0.3x-0.2y = 4
0.5x+0.5y = -45/17
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3x-2y= 40
5x+5y= -450/17
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15x-10y= 200
15x+15y= -1350/17
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Add those two equation together to get:
5y= 2050/17
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y = 410/17
Solve for "x":
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3x-2(410/17)=40
3x - 820/17 = 680/17
3x = 1500/17
x = 500/17
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Solution 500/17 , 410/17
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Cheers,
Stan H.
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