Write the first four terms of each sequence.

(1) f (1) = 7, f (n) = f (n-1) + 15

(2) f (1) = 2, f (n) = f (n-1) - 7

(3) f (1) = 30, f (n) = 2•f (n-1) - 50

What is the answer to - 4-7x=31

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