Question

solve
1/x+2/9=1/3
1/x=1/3-2/9 (this is how far i got)
I understand it a lil bit, but i still need help

Answer 1

Do the arithmetic on the right side before you try the algebra.

Answer 2

but don't you have to find a common denominator?

Answer 3

yes, you do. what would that be?

Answer 4

would it be 9, 1/x=1/9-2/9?

Answer 5

I like the 2/9, but the 1/9 is confusing - try that again

Answer 6

3/9

Answer 7

That's so much better, I can't tell you!
Now evaluate the right side.

Answer 8

so would it be x = 9?....

Answer 9

Bingo!

Answer 10

Watch out, though. Put 9 back in for x in the original problem, and make sure you get a true statement. You have to be very careful when you see an x in the denominator.

Answer 11

ok i will do that, thank you so much for your help

Answer 12

You're welcome. I always respond to questions where the student has tried to start the problem, and explains where she begins to get confused. As a former math teacher, I don't like to just give the answer. Know what I mean?

Answer 13

i do, could you help me with another one?.....this one really really confuses me

Answer 14

Sure

Answer 15

(y^2-y-12)/(y^2-6y+8) by (y^2+2y-15)/(y^2-7y+10)

Answer 16

it wants me to simplify the expression, and i dont understand at all

Answer 17

Tell you what, that's not going to be quick, I've got to go to dinner. Post it and if you're still having a problem when I check later we'll try it. *:23 EDT

Answer 18

ok thank you

Answer 19

BTW - try to factor each of the quadratics. I hope you've done that with your instructor.