Question

if x-1/x+1 = 7/3,then x = ?

Answer 1

Answer:

$\frac{x - 1}{ x+ 1} = \frac{7}{3} \\ \\ 3(x - 1) = 7(x + 1) \\ (cross \: multiplying) \\ \\ 3x - 3 = 7x + 7 \\ \\ 7x - 3x = - 7 - 3 \\ \\ 4x = - 10 \\ \\ = > x = \frac{ - 10}{4} = \frac{ - 5}{2} \\ \\ = - 2.5$

Hope this helps !

Answer 2

5/2

cross multiply both the terms

3(x - 1 ) = 7 ( x + 1 )

3x-3=7x+7

3x-7x = 7+3

-4x = 10

x = - 10/4

or -5/2