Algebra Examples

$- 1 < 2 x + 1 \leq 5$

Step 1

Move all terms not containing $x$ from the center section of the inequality.

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Subtract $1$ from each section of the inequality because it does not contain the variable we are trying to solve for.

$- 1 - 1 < 2 x \leq 5 - 1$

Subtract $1$ from $- 1$ .

$- 2 < 2 x \leq 5 - 1$

Subtract $1$ from $5$ .

$- 2 < 2 x \leq 4$

Step 2

Divide each term in the inequality by $2$ .

$\frac{- 2}{2} < \frac{2 x}{2} \leq \frac{4}{2}$

Step 3

Divide $- 2$ by $2$ .

$- 1 < \frac{2 x}{2} \leq \frac{4}{2}$

Step 4

Cancel the common factor of $2$ .

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Cancel the common factor.

$- 1 < \frac{2 x}{2} \leq \frac{4}{2}$

Divide $x$ by $1$ .

$- 1 < x \leq \frac{4}{2}$

Step 5

Divide $4$ by $2$ .

$- 1 < x \leq 2$

Step 6

The result can be shown in multiple forms.

Inequality Form:

$- 1 < x \leq 2$

Interval Notation:

$(- 1, 2]$

Step 7