What you need to do is give these problems a common denominator. Which makes 3/21 and14/21 respectively. Logically, you need to walk 4/21 of the trail. This can’t be simplified further.
2(3x + 9) = 8x - 4
6x + 18 = 8x - 4
22 = 2x
11 = x
Answer is 1.25 and converted into a fraction is 5/4 converted into a mixed fraction is 1 1/4
$16 was only for the layer.
$52-$16= cost of the cupcakes in total.
$36=cost of all cupcakes
36/24= cost of one cupcake
1.5= cost of one cupcake
each cupcake costs $1.50