Solve for x 5^x=1/625

$5^{x} = \frac{1}{625}$

Step 1

Raise $625$ to the power of $1$ .

$5^{x} = \frac{1}{625^{1}}$

Step 2

Move $625^{1}$ to the numerator using the negative exponent rule $\frac{1}{b^{n}} = b^{- n}$ .

$5^{x} = 625^{- 1}$

Step 3

Create equivalent expressions in the equation that all have equal bases.

$5^{x} = 5^{- 4}$

Step 4

Since the bases are the same, then two expressions are only equal if the exponents are also equal.

$x = - 4$