Algebra Examples

$- 2 x - - 8 x$

Step 1

Replace all occurrences of $-$ $-$ with a single $+$ . Two consecutive minus signs have the same mathematical meaning as a single plus sign because $- 1 \cdot - 1 = 1$

$- 2 x + 8 x$

Step 2

Add $- 2 x$ and $8 x$ .

$6 x$