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1). 2.862). 3.43). 12.64). 13.1 |
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Answer» $(\FRAC{{? + 2.8 + 5.6}}{{3.5 - 2.1}} = 15)$ ⇒? $({? + 8.4\over 1.4})$ = 15 ⇒ ? = 15 × 1.4 - 8.4 = 12.6 |
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