M+(-21)=-43

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Solution for M+(-21)=-43 equation: 


Simplifying
M + (-21) = -43
M + -21 = -43

Reorder the terms:
-21 + M = -43

Solving
-21 + M = -43

Solving for variable 'M'.

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

Add '21' to each side of the equation.
-21 + 21 + M = -43 + 21

Combine like terms: -21 + 21 = 0
0 + M = -43 + 21
M = -43 + 21

Combine like terms: -43 + 21 = -22
M = -22

Simplifying
M = -22

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