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