4,1-2,9+7,5=7,98

To solve the equation \( 4.1 - 2.9 + 7.5 \), let's break it down step by step:

1. Subtract: \[ 4.1 - 2.9 = 1.2 \]

2. Add: \[ 1.2 + 7.5 = 8.7 \]

So, the expression \( 4.1 - 2.9 + 7.5 \) equals \( 8.7 \), not \( 7.98 \).

If you have any further questions or need help with something else, feel free to ask!