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| rev | Admin | (Created page with "'''Solution: C''' <math display = "block"> \begin{array}{l}{{1300a_{\overline{{{20}}}|0.08}-4000=X a_{\overline{{{10}}}|0.08}}}\\ {{12,763.59-400=X(6.71008)=1306.03}}\end{array} </math> {{soacopyright | 2023 }}") | Nov 19'23 at 12:17 | +214 |