[tex]\huge\text{Hey there!}[/tex]
[tex]\large\textsf{If d = 3, then SUBSTITUTE it into the given equation}[/tex]
[tex]\large\textsf{7(3)}\mathsf{^2}\large\textsf{+ 1}[/tex]
[tex]\large\textsf{3}\mathsf{^2}[/tex]
[tex]\large\textsf{= 3 }\mathsf{\times} \large\textsf{ 3}[/tex]
[tex]\huge\textsf{= \bf 9}[/tex]
=[tex]\large\text{New EQUATION: }\large\textsf{ 7(9) + 10}[/tex]
[tex]\large\textsf{7(9) = \huge\bf 63}[/tex]
[tex]\large\textsf{= 63 + 10}[/tex]
[tex]\large\textsf{= \huge \bf 73}[/tex]
[tex]\boxed{\boxed{\large\textsf{Answer: \huge \bf 73}}}\huge\checkmark[/tex]
[tex]\large\text{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
