Solve for x 3x=21

$3 x = 21$

Step 1

Divide each term in $3 x = 21$ by $3$ .

$\frac{3 x}{3} = \frac{21}{3}$

Step 2

Simplify the left side.

Cancel the common factor of $3$ .

Cancel the common factor.

$\frac{3 x}{3} = \frac{21}{3}$

Divide $x$ by $1$ .

$x = \frac{21}{3}$

$x = \frac{21}{3}$

$x = \frac{21}{3}$

Step 3

Simplify the right side.

Divide $21$ by $3$ .

$x = 7$

$x = 7$

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