How can I construct equation for this? And solve

Question

Joseph is 7 times as old as his daughter, In five years times he will be 4 times as old as daughter will be then, what is their ages now?

Answer 1

Let $x$ be the daughter’s current age. Then the father’s current age is $7x$.

Five years from now the daughter’s age will be $x+5$, the father’s $7x+5$.

What information hasn't been used yet?

$7x+5=4(x+5)$

Answer 2

$$j = 7d$$ $$J = 4D$$ $$J = j+5$$ $$D = d+5$$