l-(-m)=n

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Solution for l-(-m)=n equation: 


Simplifying
l + -1(-1m) = n

Remove parenthesis around (-1m)
l + -1 * -1m = n

Multiply -1 * -1
l + 1m = n

Solving
l + 1m = n

Solving for variable 'l'.

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

Add '-1m' to each side of the equation.
l + 1m + -1m = -1m + n

Combine like terms: 1m + -1m = 0
l + 0 = -1m + n
l = -1m + n

Simplifying
l = -1m + n

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