Question

the following question ​

Answer 1

Answer:

X=9

$\frac{1 + x}{1 - x} = \frac{5}{ - 4}$

Can be written as

$\frac{1 + x}{1 - x} = \frac{ - 5}{4}$

$(1 + x)(4) = (1 - x) (- 5)$

$4 + 4x = - 5 + 5x$

$4 + 5 = 5x - 4x$

$9 = x$

Hope you got the answer!!

Answer 2

X=9

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