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

Walnuts $\displaystyle{x}+{6.50}\usepackage{cmbright}\Huge\$ = 6.50 +
$\displaystyle{x}\usepackage{cmbright}\Huge\$

Cashews 18.00
= 11.00 +
7

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	$\displaystyle{x}+{6.50}\usepackage{cmbright}\Huge\$	=	6.50	+	$\displaystyle{x}\usepackage{cmbright}\Huge\$
Cashews	18.00	=	11.00	+	7
Total Mix	$\displaystyle{8.60}+{\left({x}+{7}\right)}\usepackage{cmbright}\Huge\$	=	8.60	+	$\displaystyle{x}+{7}\usepackage{cmbright}\Huge\$