(-18m)-(-19m)-(-12)=8

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Solution for (-18m)-(-19m)-(-12)=8 equation:


Simplifying
(-18m) + -1(-19m) + -1(-12) = 8

Remove parenthesis around (-19m)
(-18m) + -1 * -19m + -1(-12) = 8

Multiply -1 * -19
(-18m) + 19m + -1(-12) = 8

Multiply -1 * -12
(-18m) + 19m + 12 = 8

Reorder the terms:
12 + (-18m) + 19m = 8

Combine like terms: (-18m) + 19m = 1m
12 + 1m = 8

Solving
12 + 1m = 8

Solving for variable 'm'.

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

Add '-12' to each side of the equation.
12 + -12 + 1m = 8 + -12

Combine like terms: 12 + -12 = 0
0 + 1m = 8 + -12
1m = 8 + -12

Combine like terms: 8 + -12 = -4
1m = -4

Divide each side by '1'.
m = -4

Simplifying
m = -4

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