Question Number 25778 by yesaditya22@gmail.com last updated on 14/Dec/17
Answered by Rasheed.Sindhi last updated on 14/Dec/17
$$\mathrm{9}=\frac{\mathrm{35}+\mathrm{28}}{\mathrm{7}}\:,\mathrm{12}=\frac{\mathrm{45}+\mathrm{39}}{\mathrm{7}} \\ $$$$\mathrm{So}\:?=\frac{\mathrm{51}+\mathrm{68}}{\mathrm{7}}=\mathrm{17} \\ $$