Would appreciate any help with the following question as I do not know where to start.

7, -2, 5, 3, 8

In the sequence above, each term after the first two terms is the sum of the previous two terms.

For example: 3rd term = 5 = 7 +(-2)

(a) A sequence follows the above rule.

The first term is x and the second term is y

The fifth term is 5.

X, y, -, -, 5

Show that 2x+3y=5

(b) Using the same x and y, another sequence follows the above rule.

The first term is y and the second term is x.

The sixth term is 17.

Y, x, -, -, -, 17.

Write down another equation in x and y.

© Find the values of x and y.