7 − (𝑥 − 4,5) + (−3𝑥 + 2𝑦 − 2,3)

To simplify the expression, we first distribute the negative sign in front of the parentheses:

7 - (𝑥 - 4.5) + (-3𝑥 + 2𝑦 - 2.3)

Now, distribute the negative sign inside the first set of parentheses:

7 - 𝑥 + 4.5 + (-3𝑥 + 2𝑦 - 2.3)

Now, distribute the negative sign inside the second set of parentheses:

7 - 𝑥 + 4.5 - 3𝑥 + 2𝑦 + 2.3

Combine like terms:

-𝑥 - 3𝑥 + 4.5 + 2.3 + 2𝑦 + 7

-4𝑥 + 13.8 + 2𝑦

Therefore, the simplified expression is -4𝑥 + 2𝑦 + 13.8.