Question 393058
the solution to which system of equations has a positive y value? 4 choices are listed but this is the one that's supposed to be correct---
y=3x+3 and 2x+3y=0.  I keep coming up with a negative value.  Can you help?  Thank you!
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y=3x+3 
y-3x=3..........................1
2x+3y=0. .......................2
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multiply (1) by -3
we get -3y+9x=-9
add this to (2)
3y-3y+2x+9x=-9
11x=-9
/11
x= -9/11
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plug value of x in (1)
y-3*(-9/11)=3
y+(27/11)=3
y = 3-(27/11)
y=(33-27)/11
y=6/11 which is positive
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m.ananth@hotmail.ca