Since m = 10x + 4 and m = 5x - 4, it is safe to say:
10x + 4 = 5x - 4
Both equations equal to m, thus, the two equations are equal.
Isolating x, we get:
10x - 5x = -4 - 4
5x = -8
x = -8/5
Substituting x back into the equations, we get:
m = 5(-8/5) - 4 = -8 - 4 = -12
We can verify this using the first equation:
m = 10(-8/5) + 4 = -16 + 4 = -12
Thus, m = -12