21=4m+23

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Solution for 21=4m+23 equation:


Simplifying
21 = 4m + 23

Reorder the terms:
21 = 23 + 4m

Solving
21 = 23 + 4m

Solving for variable 'm'.

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

Add '-4m' to each side of the equation.
21 + -4m = 23 + 4m + -4m

Combine like terms: 4m + -4m = 0
21 + -4m = 23 + 0
21 + -4m = 23

Add '-21' to each side of the equation.
21 + -21 + -4m = 23 + -21

Combine like terms: 21 + -21 = 0
0 + -4m = 23 + -21
-4m = 23 + -21

Combine like terms: 23 + -21 = 2
-4m = 2

Divide each side by '-4'.
m = -0.5

Simplifying
m = -0.5

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