−
3
(
7
−
2
x
)
=
−
1
−
4
x

11 feet 6 inches and 8 feet 6 inches

chad should not have included the values (1, 2) and (3, 6) because that would mean he only had half a healing card.

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)