It is known that the absolute value + 7 = 0 of the equation (m-1) x m is a linear equation of one variable with respect to X. the value of M and the solution of the equation are obtained Help me

It is known that the absolute value + 7 = 0 of the equation (m-1) x m is a linear equation of one variable with respect to X. the value of M and the solution of the equation are obtained Help me

The absolute value of (m-1) x m + 7 = 0, there is no X, how about the first-order equation of X?