Answer: Our expression is [tex]\dfrac{84}{7}-\dfrac{9}{3}=15[/tex]
Step-by-step explanation:
Since we have given that
84 divided into sevenths means
[tex]\dfrac{84}{7}\\\\=12[/tex]
9 divided into thirds means
[tex]\dfrac{9}{3}\\\\=3[/tex]
Now, 84 divided into sevenths added to 9 divided into thirds means
[tex]12+3\\\\ =15[/tex]
Hence, our expression is [tex]\dfrac{84}{7}-\dfrac{9}{3}=15[/tex]