For a given input value bbb, the function fff outputs a value aaa to satisfy the following equation.

Question: For a given input value bbb, the function fff outputs a value aaa to satisfy the following equation. 4a 7b = -524a 7b=−524, a, plus, 7, b, equals, minus, 52.

Write a formula for f(b)f(b)f, left parenthesis, b, right parenthesis in terms of bbb. f(b)=f(b)=f, left parenthesis, b, right parenthesis, equals.