18-M=15-12

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Solution for 18-M=15-12 equation: 


Simplifying
18 + -1M = 15 + -12

Combine like terms: 15 + -12 = 3
18 + -1M = 3

Solving
18 + -1M = 3

Solving for variable 'M'.

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

Add '-18' to each side of the equation.
18 + -18 + -1M = 3 + -18

Combine like terms: 18 + -18 = 0
0 + -1M = 3 + -18
-1M = 3 + -18

Combine like terms: 3 + -18 = -15
-1M = -15

Divide each side by '-1'.
M = 15

Simplifying
M = 15

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