4,2x-4,8x-6,3x-2,4x

To simplify the expression \(4.2x - 4.8x - 6.3x - 2.4x\), you can combine like terms (the terms that include \(x\)):

1. First, add the coefficients of \(x\): \[ 4.2 - 4.8 - 6.3 - 2.4 \]

2. Calculate this step-by-step:

   • \(4.2 - 4.8 = -0.6\)
   • \(-0.6 - 6.3 = -6.9\)
   • \(-6.9 - 2.4 = -9.3\)

3. Therefore, the expression simplifies to: \[ -9.3x \]

So, the final result is: \[ -9.3x \]