1. **State the problem:** Calculate the value of $3.4 - (-6.9) \times 2.4$. 2. **Recall the order of operations:** Multiplication must be done before subtraction. 3. **Calculate the multiplication first:** $$-6.9 \times 2.4 = -16.56$$ 4. **Rewrite the expression:** $$3.4 - (-16.56)$$ 5. **Subtracting a negative is the same as adding:** $$3.4 + 16.56 = 19.96$$ 6. **Final answer:** $$19.96$$