Answer: multiplicative inverse of 1/4 is 4
And the multiplicative of 5x - 1/4 is. (x + 1/4)/5
Explanation:
The inverse of 4 is 1/4 so the inverse of 1/4 is 4.
The inverse of 5x - 1/4
Let y = 5x - 1/4 and solve for x.
y = 5x - 1/4
y + 1/4 = 5x
(y + 1/4)/5 = x