0.4x+3=4.2

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Solution for 0.4x+3=4.2 equation: 


Simplifying
0.4x + 3 = 4.2

Reorder the terms:
3 + 0.4x = 4.2

Solving
3 + 0.4x = 4.2

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 0.4x = 4.2 + -3

Combine like terms: 3 + -3 = 0
0 + 0.4x = 4.2 + -3
0.4x = 4.2 + -3

Combine like terms: 4.2 + -3 = 1.2
0.4x = 1.2

Divide each side by '0.4'.
x = 3

Simplifying
x = 3

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