-400m-(-4000)=0

Solution for -400m-(-4000)=0 equation:

Simplifying
-400m + -1(-4000) = 0

Multiply -1 * -4000
-400m + 4000 = 0

Reorder the terms:
4000 + -400m = 0

Solving
4000 + -400m = 0

Solving for variable 'm'.

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

Add '-4000' to each side of the equation.
4000 + -4000 + -400m = 0 + -4000

Combine like terms: 4000 + -4000 = 0
0 + -400m = 0 + -4000
-400m = 0 + -4000

Combine like terms: 0 + -4000 = -4000
-400m = -4000

Divide each side by '-400'.
m = 10

Simplifying
m = 10