Question

rational expression equation help:
(x+4)/(x-5) = -14/13

Answer 1

just cross multiply and solve for "x" :)

Answer 2

can you show steps? when I cross multiplied I didn't get the correct answer

Answer 3

well, after you cross multiply you have to "isolate" x

Answer 4

i got -14x + 136 = -13x - 87

Answer 5

hmmm, well
13 * (x+4 ) = 13x + 52
- 14 ( x-5) = -14x + 70

Answer 6

whoops numbers from another problem.

Answer 7

why isn't the 13 negative as well as the 14?

Answer 8

when you have a negative fraction, either the numerator or the denominator is negative only \(\bf \large {\frac{a}{b} \implies\frac{a}{b}\\
\frac{-a}{-b} \implies\frac{a}{b}\\
\frac{-a}{b} \implies-\frac{a}{b}\\
\frac{a}{-b} \implies -\frac{a}{b} } \)

Answer 9

in my cases I used the -14, instead of the -13
if I had used -13, then I'd have needed to use +14

Answer 10

The actual answer is 2/3. I got -27x=-20. so 20/27. that isn't 2/3

Answer 11

13x + 52 = -14x + 70

# adding 14x to both sides

27x +52 = 70

# substracting 52 from both sides

27x = 18

thus
x = 18/27
# simplifying by dividing each by 9

x = 2/3

Answer 12

Argh. missed the 52 and wrote 50. thanks for your help.

Answer 13

yw