Final answer:
The solution to the equation 3 * -7 = $3 + 14 is 85 A.
Step-by-step explanation:
To solve the equation 3 * -7 = $3 + 14, we first simplify both sides of the equation. On the left side, 3 * -7 equals -21. On the right side, $3 + 14 equals $17. So we have -21 = $17.
Next, we need to convert the dollar sign to the numerical value. If $1 = 5 A, then $17 = 17 * 5 A = 85 A.
Therefore, the solution to the equation is 85 A.