-2+21=m-4

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Solution for -2+21=m-4 equation:


Simplifying
-2 + 21 = m + -4

Combine like terms: -2 + 21 = 19
19 = m + -4

Reorder the terms:
19 = -4 + m

Solving
19 = -4 + m

Solving for variable 'm'.

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

Add '-1m' to each side of the equation.
19 + -1m = -4 + m + -1m

Combine like terms: m + -1m = 0
19 + -1m = -4 + 0
19 + -1m = -4

Add '-19' to each side of the equation.
19 + -19 + -1m = -4 + -19

Combine like terms: 19 + -19 = 0
0 + -1m = -4 + -19
-1m = -4 + -19

Combine like terms: -4 + -19 = -23
-1m = -23

Divide each side by '-1'.
m = 23

Simplifying
m = 23

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