Algebra Examples

$- 21 + - 6 (23 - 1)$

Step 1

Replace all occurrences of $+$ $-$ with a single $-$ . A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because $1 \cdot - 1 = - 1$

$- 21 - 6 (23 - 1)$

Step 2

Simplify each term.

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Step 2.1

Subtract $1$ from $23$ .

$- 21 - 6 \cdot 22$

Step 2.2

Multiply $- 6$ by $22$ .

$- 21 - 132$

Step 3

Subtract $132$ from $- 21$ .

$- 153$