7M-1=13

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Solution for 7M-1=13 equation: 


Simplifying
7M + -1 = 13

Reorder the terms:
-1 + 7M = 13

Solving
-1 + 7M = 13

Solving for variable 'M'.

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

Add '1' to each side of the equation.
-1 + 1 + 7M = 13 + 1

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

Combine like terms: 13 + 1 = 14
7M = 14

Divide each side by '7'.
M = 2

Simplifying
M = 2

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