When m, n are values, 5-2n + (n + m) of y = (2m-1) x is a linear function, and when m, n are values, they are positive proportional functions?

When m, n are values, 5-2n + (n + m) of y = (2m-1) x is a linear function, and when m, n are values, they are positive proportional functions?

The linear function is y = KX + B, so it has 5-2n = 1, n = 2; 2m-1 ≠ 0, m ≠ 1 / 2
In addition to n = 2, we also need n + M = 0, M = - 2