Question

SIMPLE ALGEBRA?? 1/5x-1/4x=3... solve for x

Answer 1

x = -60 :)

Answer 2

Would you like to know how i got to that?

Answer 3

yes please!

Answer 4

(1/5x) and (1/4x) don't have common denominators so you can't subtract them!
so the best common denominator would be 20.

You multiply 1/5x times 4/4 to get 4/20x.

Then you multiply 1/4x times 5/5 to get 5/20x.

Now that you have common denominators you can subtract 4/20x - 5/20x which equals -1/20x.

So now your problems looks like this: -1/20x = 3.

To get x by itself you multiply by the reciprocal of -1/20x on each sides.
Your x becomes by itselfs because -1/20 times -20/1 cancel out.

NOWWW your problem looks like this x= 3(-20/1)

3(-20) = -60. Divide that by 1 and it stays -60.

Which means x= 60.

Answer 5

** oops i mean x = -60. !

Answer 6

thank you !