Question

find the value of x ​

Answer 1

Answer:

The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try! A variable doesn't have to be "x", it could be "y", "w" or any letter, name or symbol.

Answer 2

Step-by-step explanation:

$\frac{1}{2 {}^{x} } + \frac{1}{ {2}^{x} } + \frac{1}{ {2}^{x} } = 3$

$3 \times \frac{1}{ {2}^{x} } = 3$

$\frac{1}{ {2}^{x} } = \frac{3}{3}$

$\frac{1}{ {2}^{x} } = \frac{1}{1}$

${2}^{x} = 1$

Therefore x=0.

Coz,

We know the identity:

$\boxed{ {a}^{0} = 1}$