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+ | |
+ | |
= | 60 |
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= | 60/3 | ||||
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= | 20 | ||||
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+ |  |
+ | |
= | 30 |
| 20 | + | |
+ | |
= | 30 |
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+ | |
= | 10 | ||
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= | 10/2 | ||||
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= | 5 | ||||
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- |  |
= | 3 | ||
| 5 | - | |
= | 3 | ||
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= | 2 | ||||
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= | 1 | ||||
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+ | |
x |  |
= | ? |
| 1 | + | 20 | x | 4 | = | ? |
| 1 | + | 80 | = | 81 | ||
Answer is : 81 | ||||||
