17/5X24/9+17/9x24/7=17/9×24/5+17/9×24/7=17/9×(24/5+24/7)=17/9×2/1=34/9
17/5X24/9+17/9x24/7 =17/9X24/5+17/9x24/7 =17/9×(24/5+24/7)=17/9×2/1=34/9
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