Book Maths Puzzle Age Problem

In three years, Chad will be three times my present age. I will then be half as old as he. How old am I now?

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Book Other Question

A fish is 30-inches long. The head is as long as the tail. If the head was twice as long and the tail was its present length, the body would be 18-inches long. How long is each y = -3x(squared)
I need to find out the vertex, roots, if opens upward or downward, different points in order to graph parabola, and using the quadratic equation for something.