3x+4.2=12

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Solution for 3x+4.2=12 equation: 


Simplifying
3x + 4.2 = 12

Reorder the terms:
4.2 + 3x = 12

Solving
4.2 + 3x = 12

Solving for variable 'x'.

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

Add '-4.2' to each side of the equation.
4.2 + -4.2 + 3x = 12 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + 3x = 12 + -4.2
3x = 12 + -4.2

Combine like terms: 12 + -4.2 = 7.8
3x = 7.8

Divide each side by '3'.
x = 2.6

Simplifying
x = 2.6

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