2m-4.2=0.4-0.3m

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Solution for 2m-4.2=0.4-0.3m equation: 


Simplifying
2m + -4.2 = 0.4 + -0.3m

Reorder the terms:
-4.2 + 2m = 0.4 + -0.3m

Solving
-4.2 + 2m = 0.4 + -0.3m

Solving for variable 'm'.

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

Add '0.3m' to each side of the equation.
-4.2 + 2m + 0.3m = 0.4 + -0.3m + 0.3m

Combine like terms: 2m + 0.3m = 2.3m
-4.2 + 2.3m = 0.4 + -0.3m + 0.3m

Combine like terms: -0.3m + 0.3m = 0.0
-4.2 + 2.3m = 0.4 + 0.0
-4.2 + 2.3m = 0.4

Add '4.2' to each side of the equation.
-4.2 + 4.2 + 2.3m = 0.4 + 4.2

Combine like terms: -4.2 + 4.2 = 0.0
0.0 + 2.3m = 0.4 + 4.2
2.3m = 0.4 + 4.2

Combine like terms: 0.4 + 4.2 = 4.6
2.3m = 4.6

Divide each side by '2.3'.
m = 2

Simplifying
m = 2

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