1.2+0.1x=0.4x-4.2

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Solution for 1.2+0.1x=0.4x-4.2 equation: 


Simplifying
1.2 + 0.1x = 0.4x + -4.2

Reorder the terms:
1.2 + 0.1x = -4.2 + 0.4x

Solving
1.2 + 0.1x = -4.2 + 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.
1.2 + 0.1x + -0.4x = -4.2 + 0.4x + -0.4x

Combine like terms: 0.1x + -0.4x = -0.3x
1.2 + -0.3x = -4.2 + 0.4x + -0.4x

Combine like terms: 0.4x + -0.4x = 0.0
1.2 + -0.3x = -4.2 + 0.0
1.2 + -0.3x = -4.2

Add '-1.2' to each side of the equation.
1.2 + -1.2 + -0.3x = -4.2 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + -0.3x = -4.2 + -1.2
-0.3x = -4.2 + -1.2

Combine like terms: -4.2 + -1.2 = -5.4
-0.3x = -5.4

Divide each side by '-0.3'.
x = 18

Simplifying
x = 18

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