Answer:
The answer to your question is He bought 7 large candles and 9 small candles.
Step-by-step explanation:
Data
Large candles = L cost = $7
small candles = s cost = $3
Total cost = $76
Total candles = 16
Process
- Write two equations
L + s = 16 ------------ (I)
7L + 3s = 76 ------------- (II)
- Solve the system of equations by elimination
Multiply equation I by -7
-7L - 7s = -112
7L + 3s = 76
Simplify
0 - 4s = - 36
Solve for s
s = -36 / -4
s = 9
Substitute s in equation I
L + 9 = 16
Solve for L
L = 16 - 9
L = 7
