Algebra Examples

$x - - 1 = 3$

Step 1

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

$x + 1 = 3$

Step 2

Subtract $1$ from both sides of the equation.

$x = 3 - 1$

Step 3

Subtract $1$ from $3$ .

$x = 2$