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Question 744087: I am using substitution to find coordinates for x and y. Problem reads: 2x+3y=25 , where y=3x+1.
I understood that to be 2x+3*(3x+1)=25,
Using distributive property, now I have 2x+9x+1=25.
Simplified that to 11x=24, or x=24/11
My textbook shows the correct final answer for coordinates is x=2, y=7, so I am way off. Can you tell where I went wrong?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! I am using substitution to find coordinates for x and y.
Problem reads:
2x+3y=25
y = 3x+1
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I understood that to be 2x+3*(3x+1)=25,
Using distributive property, now I have 2x+9x+3 = 25.
Simplified that to 11x=22, or x = 2
Solve for "y":
y = 3x+1
y = 3*2+1 = 7
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My textbook shows the correct final answer for coordinates is x=2, y=7
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Cheers,
Stan H.
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