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Precalculus Examples

$7 < x + 4 < 12$

Step 1

Subtract $4$ from each section of the inequality because it does not contain the variable we are trying to solve for.

$7 - 4 < x < 12 - 4$

Step 2

Subtract $4$ from $7$ .

$3 < x < 12 - 4$

Step 3

Subtract $4$ from $12$ .

$3 < x < 8$

Step 4

The result can be shown in multiple forms.

Inequality Form:

$3 < x < 8$

Interval Notation:

$(3, 8)$

Step 5

Enter YOUR Problem

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$