Question

x/2 ± x = 9

please explain how this is the answer.

Answer 1

Answer:

x/2 ± x = 9

$x + \frac{x}{2} = 9 \: or \: x - \frac{x}{2} = 9$

$x + \frac{x}{2} = 9$

$= \frac{2x + x}{2} = 9$

$= 3x = 18$

$= x = 6$

$x - \frac{x}{2} = 9$

$= \frac{2x - x}{2} = 9$

$= x = 18$

$x = 6 \: or \: 18$

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