Precalculus Examples

$7 (- 3) + - 4 = 6$

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 $1 \cdot - 1 = - 1$

$7 (- 3) - 4 = 6$

Step 2

The left side $- 25$ does not equal to the right side $6$ , which means that the given statement is false.

False