7-M=-13

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Solution for 7-M=-13 equation: 


Simplifying
7 + -1M = -13

Solving
7 + -1M = -13

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 + -1M = -13 + -7

Combine like terms: 7 + -7 = 0
0 + -1M = -13 + -7
-1M = -13 + -7

Combine like terms: -13 + -7 = -20
-1M = -20

Divide each side by '-1'.
M = 20

Simplifying
M = 20

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