Algebra Examples

$7 - 5 p + 3 q$ when $p = 1$ and $q = 7$

Step 1

Replace the variable $p$ with $1$ in the expression.

$7 - 5 \cdot 1 + 3 q$

Step 2

Replace the variable $q$ with $7$ in the expression.

$7 - 5 \cdot 1 + 3 (7)$

Step 3

Simplify each term.

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Step 3.1

Multiply $- 5$ by $1$ .

$7 - 5 + 3 (7)$

Step 3.2

Multiply $3$ by $7$ .

$7 - 5 + 21$

Step 4

Simplify by adding and subtracting.

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Step 4.1

Subtract $5$ from $7$ .

$2 + 21$

Step 4.2

Add $2$ and $21$ .

$23$