0.12=0.4+1.2(X-0.4)

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Solution for 0.12=0.4+1.2(X-0.4) equation: 


Simplifying
0.12 = 0.4 + 1.2(X + -0.4)

Reorder the terms:
0.12 = 0.4 + 1.2(-0.4 + X)
0.12 = 0.4 + (-0.4 * 1.2 + X * 1.2)
0.12 = 0.4 + (-0.48 + 1.2X)

Combine like terms: 0.4 + -0.48 = -0.08
0.12 = -0.08 + 1.2X

Solving
0.12 = -0.08 + 1.2X

Solving for variable 'X'.

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

Add '-1.2X' to each side of the equation.
0.12 + -1.2X = -0.08 + 1.2X + -1.2X

Combine like terms: 1.2X + -1.2X = 0.0
0.12 + -1.2X = -0.08 + 0.0
0.12 + -1.2X = -0.08

Add '-0.12' to each side of the equation.
0.12 + -0.12 + -1.2X = -0.08 + -0.12

Combine like terms: 0.12 + -0.12 = 0.00
0.00 + -1.2X = -0.08 + -0.12
-1.2X = -0.08 + -0.12

Combine like terms: -0.08 + -0.12 = -0.2
-1.2X = -0.2

Divide each side by '-1.2'.
X = 0.1666666667

Simplifying
X = 0.1666666667

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