m-4.2=2.1m-.9

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Solution for m-4.2=2.1m-.9 equation:


Simplifying
m + -4.2 = 2.1m + -0.9

Reorder the terms:
-4.2 + m = 2.1m + -0.9

Reorder the terms:
-4.2 + m = -0.9 + 2.1m

Solving
-4.2 + m = -0.9 + 2.1m

Solving for variable 'm'.

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

Add '-2.1m' to each side of the equation.
-4.2 + m + -2.1m = -0.9 + 2.1m + -2.1m

Combine like terms: m + -2.1m = -1.1m
-4.2 + -1.1m = -0.9 + 2.1m + -2.1m

Combine like terms: 2.1m + -2.1m = 0.0
-4.2 + -1.1m = -0.9 + 0.0
-4.2 + -1.1m = -0.9

Add '4.2' to each side of the equation.
-4.2 + 4.2 + -1.1m = -0.9 + 4.2

Combine like terms: -4.2 + 4.2 = 0.0
0.0 + -1.1m = -0.9 + 4.2
-1.1m = -0.9 + 4.2

Combine like terms: -0.9 + 4.2 = 3.3
-1.1m = 3.3

Divide each side by '-1.1'.
m = -3

Simplifying
m = -3

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