x
 = 
2
1
1

Cross multiply:
x * 1 = 1 * 2

Simplifying
x * 1 = 1 * 2

Reorder the terms for easier multiplication:
1x = 1 * 2

Multiply 1 * 2
1x = 2

Solving
1x = 2

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '1'.
x = 2

Simplifying
x = 2