Solve by Factoring square root of 5x=20

$\sqrt{5 x} = 20$

Step 1

Subtract $20$ from both sides of the equation.

$\sqrt{5 x} - 20 = 0$

Step 2

Add $20$ to both sides of the equation.

$\sqrt{5 x} = 20$

Step 3

To remove the radical on the left side of the equation, square both sides of the equation.

${\sqrt{5 x}}^{2} = 20^{2}$

Step 4

Simplify each side of the equation.

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{5 x}$ as ${(5 x)}^{\frac{1}{2}}$ .

${({(5 x)}^{\frac{1}{2}})}^{2} = 20^{2}$

Simplify the left side.

Simplify ${({(5 x)}^{\frac{1}{2}})}^{2}$ .

Multiply the exponents in ${({(5 x)}^{\frac{1}{2}})}^{2}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

${(5 x)}^{\frac{1}{2} \cdot 2} = 20^{2}$

Cancel the common factor of $2$ .

Cancel the common factor.

${(5 x)}^{\frac{1}{2} \cdot 2} = 20^{2}$

Rewrite the expression.

${(5 x)}^{1} = 20^{2}$

Simplify.

$5 x = 20^{2}$

Simplify the right side.

Raise $20$ to the power of $2$ .

$5 x = 400$

Step 5

Divide each term in $5 x = 400$ by $5$ and simplify.

Divide each term in $5 x = 400$ by $5$ .

$\frac{5 x}{5} = \frac{400}{5}$

Simplify the left side.

Cancel the common factor of $5$ .

Cancel the common factor.

$\frac{5 x}{5} = \frac{400}{5}$

Divide $x$ by $1$ .

$x = \frac{400}{5}$

Simplify the right side.

Divide $400$ by $5$ .

$x = 80$