12=.4*x

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Solution for 12=.4*x equation:


Simplifying
12 = 0.4x

Solving
12 = 0.4x

Solving for variable 'x'.

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

Add '-0.4x' to each side of the equation.
12 + -0.4x = 0.4x + -0.4x

Combine like terms: 0.4x + -0.4x = 0.0
12 + -0.4x = 0.0

Add '-12' to each side of the equation.
12 + -12 + -0.4x = 0.0 + -12

Combine like terms: 12 + -12 = 0
0 + -0.4x = 0.0 + -12
-0.4x = 0.0 + -12

Combine like terms: 0.0 + -12 = -12
-0.4x = -12

Divide each side by '-0.4'.
x = 30

Simplifying
x = 30

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