Answer :
$6(.80) * 20x =12x* 11(.80)
4.80* 20x = 12x*8.80
-12x -12x
$4.80 * 8x = 8.80
-4.80 -4.80
8x=4
/8 /8
x=$.50
Proof;
6(.80) + 20(.50) = $14.80
12(.50) + 11(.80) = $14.80
4.80* 20x = 12x*8.80
-12x -12x
$4.80 * 8x = 8.80
-4.80 -4.80
8x=4
/8 /8
x=$.50
Proof;
6(.80) + 20(.50) = $14.80
12(.50) + 11(.80) = $14.80