I don't understand how you came up with the equations.

Where does this come from? Is this supposed to mean that y = 1?

Why do youThe mothers age >

addtwo mother's ages: the current one and the future one? And why do you square the result?

Mother's current age is . After some number of years, she is .

Daugter's current age is . After thesamenumber of years, she is .

From this, it seems clear how to construct an equation.