2,5(4-3y)-y+2,3

To simplify the expression \( 2.5(4 - 3y) - y + 2.3 \), follow these steps:

1. Distribute \( 2.5 \) to the terms inside the parentheses: \[ 2.5 \times 4 - 2.5 \times 3y = 10 - 7.5y \]

2. Substitute this back into the expression: \[ 10 - 7.5y - y + 2.3 \]

3. Combine like terms:

   • Combine the constant terms: \( 10 + 2.3 = 12.3 \)
   • Combine the \( y \) terms: \( -7.5y - y = -8.5y \)

Putting it all together, the simplified expression is: \[ 12.3 - 8.5y \]