Name: ________ Date:_________
Finding the unknown value (S14)
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1
1
4
–
2
=
5
5
2
2
–
1
=
3
2
3
4
–
x
=
11
5
20
4
x
–
1
=
1
2
3
5
3
–
x
=
7
4
5
20
6
x
–
2
=
1
4
3
12