Because these are not like terms, they cannot be combined. The variables are different, that's what makes them not like terms
8x+5y=$24
6x+2y=$16.60
16x+10y=$48
-30x-10y=-$83
-14x=-$35
x=$2.50
8($2.50)+5y=$24
$20.00+5y=$24
5y=$4
y=$0.80
Hamburgers costs $2.50 each
Fries cost $0.80 each
If your asking if it is a pattern then yes
X is 2 y is 4 you just add and subtract
