Solve for x -7x=21

$- 7 x = 21$

Step 1

Divide each term in $- 7 x = 21$ by $- 7$ .

$\frac{- 7 x}{- 7} = \frac{21}{- 7}$

Step 2

Simplify the left side.

Cancel the common factor of $- 7$ .

Cancel the common factor.

$\frac{- 7 x}{- 7} = \frac{21}{- 7}$

Divide $x$ by $1$ .

$x = \frac{21}{- 7}$

$x = \frac{21}{- 7}$

$x = \frac{21}{- 7}$

Step 3

Simplify the right side.

Divide $21$ by $- 7$ .

$x = - 3$

$x = - 3$

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