Question

1 - 2X = -X - 3

use the number one rule of algebra to solve the equation

Answer 1

$1 - 2x = - x - 3 \\ 1 + 3 = 2x - x \\ x = 4$

Answer 2

Re-arrange the numbers to descending order

-2x + 1 = -x - 3

Add two to both sides

-2x + 2x = 0

x - 3 = 1

Add three to both sides

-3 + 3 = 0

3 + 1 = 4

Answer

$x = 4$