Answer:
The answer to your question is $6 per joop, $9 per pib
Explanation:
Data
Equation l 5x + 4y = 66
Equation ll 3x + 6y = 72
Process
1.- Multiply equation l by 3 and equation ll by -5
15x + 12y = 198
-15x - 30y = -360
- Simplify
0 - 18y = -162
- Solve for y
y = -162/-18
y = 9
2.- Substitute y in Equation l
5x + 4(9) = 66
5x + 36 = 66
5x = 66 - 36
5x = 30
-Solve for x
x = 30/5
x = 6