Name: ________ Date:_________
Finding the unknown value (S15)
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1
2
–
1
=
3
6
2
5
–
4
=
6
5
3
3
–
x
=
13
4
28
4
x
–
4
=
5
7
28
5
4
–
x
=
2
5
3
15
6
x
–
1
=
1
5
6
30