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21 January, 04:29
11 + ? * 7 - ? = - 21
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Shyla Carter
21 January, 07:39
0
Rewrite as
11 + (7x) - x=-21
11+6x=-21
6x=-32
X = - 32/6 = - 16/3
Check:
11 + (-16/3*7) + 16/3=
11-112/3+16/3=
11-96/3=
11-32=
-21 it works
So ... ? = - 16/3
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