what should you substitute for y in the second equation (bottom equation) in order to solve the system by the substitution method? write your answer as a polynomial in descending order of terms.
12x -6y= -6
4x -5y =4

Question

what should you substitute for y in the second equation (bottom equation) in order to solve the system by the substitution method? write your answer as a polynomial in descending order of terms. 
12x -6y= -6
4x -5y =4

campbell_st · Answer

rewrite the 1st equation with y as the subject

12x + 6 = 6y

divide by 6
y = 2x + 1

anonymous · Answer

If I was going to do this one by substitution, I would rearrange the first equation to be$$y=2x+1$$ and substitute that into the second equation.  Your method and results may vary.

anonymous · Answer

What they have said above is right.

Just a correction @AnimalAin: The method may vary but the results won't.

anonymous · Answer

If you solve for x, you will have to resign yourself to working with fractions.  It isn't a showstopper, but somewhat more inconvenient than dealing integers.

anonymous · Answer

Concerning the results not varying, you obviously haven't watched me do the same problem twice, and get different answers...LOL

anonymous · Answer

Quantum Theory! :P