2
 = 
6
x
18

Cross multiply:
2 * 18 = x * 6

Simplifying
2 * 18 = x * 6

Multiply 2 * 18
36 = x * 6

Reorder the terms for easier multiplication:
36 = 6x

Solving
36 = 6x

Solving for variable 'x'.

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

Add '-6x' to each side of the equation.
36 + -6x = 6x + -6x

Combine like terms: 6x + -6x = 0
36 + -6x = 0

Add '-36' to each side of the equation.
36 + -36 + -6x = 0 + -36

Combine like terms: 36 + -36 = 0
0 + -6x = 0 + -36
-6x = 0 + -36

Combine like terms: 0 + -36 = -36
-6x = -36

Divide each side by '-6'.
x = 6

Simplifying
x = 6