+197 A sandwich and 4 cheese buns cost $(w + 4).
A sandwich and 2 cheese buns cost $(w + 2).
Each cheese bun costs $_______________.
A sandwich costs $_______________.
+318 S + 4C = $ ( w+4 )
S + 2C = $ ( w+2 )
2C = $2
1C = $1
1S = $ ( w+2 ) - 1 - 1 = w
1 Cheese Bun -> $1
1 Sandwich -> $w
