Question 744087
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.