M-(-3)=7

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Solution for M-(-3)=7 equation: 


Simplifying
M + -1(-3) = 7

Multiply -1 * -3
M + 3 = 7

Reorder the terms:
3 + M = 7

Solving
3 + M = 7

Solving for variable 'M'.

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

Add '-3' to each side of the equation.
3 + -3 + M = 7 + -3

Combine like terms: 3 + -3 = 0
0 + M = 7 + -3
M = 7 + -3

Combine like terms: 7 + -3 = 4
M = 4

Simplifying
M = 4

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