(84,01-m)*1,2=78,54

To solve the equation \( (84.01 - m) \times 1.2 = 78.54 \), follow these steps:

1. Divide both sides by 1.2 to isolate the expression involving \( m \): \[ 84.01 - m = \frac{78.54}{1.2} \]

   Calculate the right side: \[ \frac{78.54}{1.2} = 65.45 \]

   Now, the equation is: \[ 84.01 - m = 65.45 \]

2. Rearrange the equation to isolate \( m \): \[ m = 84.01 - 65.45 \]

   Now, perform the subtraction: \[ m = 18.56 \]

Therefore, the value of \( m \) is \( 18.56 \).