a: If \(2\), \(3\), \(6\) and \(y - 1\) are proportional, then \(y = \ldots\)
MR/Nasef.N
b: If \(3\), \(t - 1\), \(t + 1\) and \(5\) are proportional, then \(t = \ldots\)
MR/Nasef.N
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