1.	Which equation does the model represent?
		A.	x + 5 = -1	B.	x + (-5) = -1
		C.	x + (-5) = 1	D.	x + 5 = 1
		Hint
	2.	Solve the equation 14 = 7 + x.
		A.	-21	B.	2
		C.	-7	D.	7
		Hint
	3.	Solve the equation -8 = a + (-3).
		A.	-11	B.	11
		C.	5	D.	-5
		Hint
	4.	The length of the Nile river is 4180 miles. That is 268 miles more than the Amazon river. If l is the length of the Amazon river, which equation represents this situation?
		A.	l + (-268) = 4180	B.	l = 4180 + 268
		C.	l - 268 = 4180	D.	l + 268 = 4180
		Hint
	5.	Which equation does the model represent?
		A.	x + (-3) = -2	B.	x + 2 = 3
		C.	x + (-2) = -3	D.	x + 3 = 2
		Hint