I'm having trouble with equations that have more than one variable. I need to solve for "y" and I've gotten the problem from 6*y−4−3*y+1=12 to 6*y-3*y=15. First of all did I simplify right. Second, what is a formula for any equation with more than one variable.

Question

anonymous · Answer

I forgot to say that (if it helps) I know "y"=5

anonymous · Answer

Yes, you simplified correctly.  At this point, apply the distributive property in reverse:$$6y-3y=(6-3)y=3y$$

anonymous · Answer

I so sorry but you lost me.

anonymous · Answer

Would you agree with me that $(6-3)y = 6y-3y$ by the distributive property?

anonymous · Answer

Yes, that part makes sense.

anonymous · Answer

Oh now I understand. Thank you so much and have a happy national battery day

anonymous · Answer

So since we can agree $6y-3y=(6-3)y=3y$, we can turn your equation $6y-3y=12$ into $3y=12$, which I am confident you can solve.

anonymous · Answer

Wait, I'm lost again how did you get 12.

anonymous · Answer

Sorry...typo.  Meant 15 as you wrote above.  We turn $6y-3y=15$ into $3y=15$.

anonymous · Answer

Ok give me a moment to analyze in my head.