Total cost ($) = Price ($/pound) * Amount (pounds)

Walnuts 60.50
= 6.50 * 7

Cashews $\displaystyle{11}{x}\usepackage{cmbright}\Huge\$ = 11.00 * $\displaystyle{x}\usepackage{cmbright}\Huge\$

Total Mix $\displaystyle{8.60}{\left({x}+{7}\right)}\usepackage{cmbright}\Huge\$ = 8.60 * $\displaystyle{x}+{7}\usepackage{cmbright}\Huge\$

	Total cost ($)	=	Price ($/pound)	*	Amount (pounds)
Walnuts	60.50	=	6.50	*	7
Cashews	$\displaystyle{11}{x}\usepackage{cmbright}\Huge\$	=	11.00	*	$\displaystyle{x}\usepackage{cmbright}\Huge\$
Total Mix	$\displaystyle{8.60}{\left({x}+{7}\right)}\usepackage{cmbright}\Huge\$	=	8.60	*	$\displaystyle{x}+{7}\usepackage{cmbright}\Huge\$