Algebra Examples

$13 - 0.75 w + 8 x$ when $w = 12$ and $x = \frac{1}{2}$

Step 1

Replace the variable $w$ with $12$ in the expression.

$13 - 0.75 \cdot 12 + 8 x$

Step 2

Replace the variable $x$ with $\frac{1}{2}$ in the expression.

$13 - 0.75 \cdot 12 + 8 (\frac{1}{2})$

Step 3

Simplify each term.

Tap for more steps...

Step 3.1

Multiply $- 0.75$ by $12$ .

$13 - 9 + 8 (\frac{1}{2})$

Step 3.2

Cancel the common factor of $2$ .

Tap for more steps...

Step 3.2.1

Factor $2$ out of $8$ .

$13 - 9 + 2 (4) \frac{1}{2}$

Step 3.2.2

Cancel the common factor.

$13 - 9 + 2 \cdot 4 \frac{1}{2}$

Step 3.2.3

Rewrite the expression.

$13 - 9 + 4$

Step 4

Simplify by adding and subtracting.

Tap for more steps...

Step 4.1

Subtract $9$ from $13$ .

$4 + 4$

Step 4.2

Add $4$ and $4$ .

$8$