The answer to your question is y=5x
Answer:
(-25 + 4 squared) x 7
( -25 + 16) x 7
-9 x 7
-63
Step-by-step explanation:
Let s be the son's age 15 yeasr ago and m the mother's age that year.

We also know that:

Plotting vallues:

Remember that they were that age 15 years ago.
So their actual age is 30 and 60.