12*.21=x

Solution for 12*.21=x equation:

Simplifying
12 * 0.21 = x

Multiply 12 * 0.21
2.52 = x

Solving
2.52 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
2.52 + -1x = x + -1x

Combine like terms: x + -1x = 0
2.52 + -1x = 0

Add '-2.52' to each side of the equation.
2.52 + -2.52 + -1x = 0 + -2.52

Combine like terms: 2.52 + -2.52 = 0.00
0.00 + -1x = 0 + -2.52
-1x = 0 + -2.52

Combine like terms: 0 + -2.52 = -2.52
-1x = -2.52

Divide each side by '-1'.
x = 2.52

Simplifying
x = 2.52