(-7m+5n)-(2m+4n)=

Solution for (-7m+5n)-(2m+4n)= equation:

Simplifying
(-7m + 5n) + -1(2m + 4n) = 0

Remove parenthesis around (-7m + 5n)
-7m + 5n + -1(2m + 4n) = 0
-7m + 5n + (2m * -1 + 4n * -1) = 0
-7m + 5n + (-2m + -4n) = 0

Reorder the terms:
-7m + -2m + 5n + -4n = 0

Combine like terms: -7m + -2m = -9m
-9m + 5n + -4n = 0

Combine like terms: 5n + -4n = 1n
-9m + 1n = 0

Solving
-9m + 1n = 0

Solving for variable 'm'.

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

Add '-1n' to each side of the equation.
-9m + 1n + -1n = 0 + -1n

Combine like terms: 1n + -1n = 0
-9m + 0 = 0 + -1n
-9m = 0 + -1n
Remove the zero:
-9m = -1n

Divide each side by '-9'.
m = 0.1111111111n

Simplifying
m = 0.1111111111n