M-7=-20

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Solution for M-7=-20 equation: 


Simplifying
M + -7 = -20

Reorder the terms:
-7 + M = -20

Solving
-7 + M = -20

Solving for variable 'M'.

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

Add '7' to each side of the equation.
-7 + 7 + M = -20 + 7

Combine like terms: -7 + 7 = 0
0 + M = -20 + 7
M = -20 + 7

Combine like terms: -20 + 7 = -13
M = -13

Simplifying
M = -13

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