Algebra Examples

$w - - 3 = 18$

Step 1

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

$w + 3 = 18$

Step 2

Subtract $3$ from both sides of the equation.

$w = 18 - 3$

Step 3

Subtract $3$ from $18$ .

$w = 15$