Respuesta :

edwardjgrant
15 > 3(2-t)

15 > 6-3t
9 > -3t

dividing by a negative number reverses the sign so when diving by -3 you get
t < -3
15 > 3 (2-t)

⇒ 3(2 - t) < 15                (change LHS and RHS)

⇒ 6 - 3t < 15

⇒ 6 - 3t - 6 < 15 - 6        (subtract 6)

⇒ -3t < 9

⇒ -1 * -3t > -1 * 9            (multiply -1 and change '<' to '>')

⇒ 3t > -9

⇒ 3t/3  > -9/3                  (divide by 3)

⇒ t > -3                            (final answer)


Hope it helps!

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