Name: ________ Date:_________

Finding the unknown value (A40)

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1

3	+	4	=
5		7

2

1	+	1	=
2		7

3

	3	+	x	=	19
	4				20

4

x	+	1	=	23
		6		30

5

	3	+	x	=	1	7
	4		5			20

6

	x	+	1	=	7
	3		4		12