Greatest common factor is 1 for the first one and the second one is also 1
You’d have to solve your equations!
they’d be the same when x=-56
and when x=-56 they’d BOTH equal -27
Double is double, so you can solve
.. 2 = 1*e^(.08t)
and get the correct value of t.
Taking logs,
.. ln(2) = .08t
.. ln(2)/.08 = t ≈ 8.7 . . . . years