M+3=M-1

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Solution for M+3=M-1 equation: 


Simplifying
M + 3 = M + -1

Reorder the terms:
3 + M = M + -1

Reorder the terms:
3 + M = -1 + M

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

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

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

Solving
3 = -1

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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