Math CentralQuandaries & Queries


Question from Kayla, a student:

I am having problems with substitution type simultaneous equations, when the variable you are substituting is a algebraic one:
y=x^2-3x+4 and 3x-2y=1
I have rearranged 3x-2y=1 to get x=(1+2y)/3 but when I substitute this x value into the other equation, I get the wrong answers!
Would appreciate any help! Thank you.

OMG Kayla that's ugly. I rearranged $3x-2y=1$ to get $ y = \large \frac{3x - 1}{2}$ and than substituted into $y = x^2-3x+4.$ Try that and see if you get the correct answer.


About Math Central


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
Quandaries & Queries page Home page University of Regina PIMS