Name: ________ Date:_________
Finding the unknown value (S23)
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1
3
–
2
=
4
3
2
1
4
–
1
1
=
5
3
3
1
–
x
=
1
2
3
4
x
–
1
=
11
5
20
5
5
–
x
=
1
6
3
2
6
x
–
1
=
11
5
4
20