Incorrect. The complete table should look like this:

	Total cost ($)	=	Price ($/pound)	*	Amount (pounds)
Walnuts	$\displaystyle{6.5}{x}\usepackage{cmbright}\Huge\$	=	6.50	*	$\displaystyle{x}\usepackage{cmbright}\Huge\$
Cashews	77	=	11.00	*	7
Total Mix	$\displaystyle{8.60}{\left({x}+{7}\right)}\usepackage{cmbright}\Huge\$	=	8.60	*	$\displaystyle{x}+{7}\usepackage{cmbright}\Huge\$

This allows you to create the equation: $\displaystyle{6.5}{x}+{77}={8.60}{\left({x}+{7}\right)}\usepackage{cmbright}\Huge\$ . Solve for x to find the amount of walnuts needed.