solve for f.\n86.4 = 2.9(f + 19) + 11\nf =

Explanation:

Step1: Subtract 11 from both sides

$$86.4 - 11=2.9(f + 19)+11-11$$ $$75.4 = 2.9(f + 19)$$

Step2: Divide both sides by 2.9

$$\frac{75.4}{2.9}=\frac{2.9(f + 19)}{2.9}$$ $$26=f + 19$$

Step3: Subtract 19 from both sides

$$26-19=f + 19-19$$ $$f = 7$$

Answer:

(f = 7)