Liam = 4t = 5.50
Zachary = 3t = 6.50
7t = 12.00
t = 12.00/7
t = 1.71
T= price of the taco spend the same amount
3^1x3^1/3^1=3
Steps
3x1=3
3x1=3
3/3=3
Hope that helps
There is actually a cool trick to this. When you see a and 2a, in this case 6 and 12, then the small triangle is a 60-30-90 triangle. The remaining side is

.
This value rounds down to 10, and yep, you guessed it, another 30-60-90.
This time, x =

.
This is a very difficult problem and requires knowledge of the special triangles. Hope this helps!
Pi equals to the number 3.14