To distribute the "minus" sign outside the parentheses in the expression \(-(-7x + 3.2y + 8.3)\), you change the sign of each term inside the parentheses:
\[ -(-7x) + (-3.2y) + (-8.3) = 7x - 3.2y - 8.3 \]
So, the equivalent expression is:
\[ 7x - 3.2y - 8.3 \]