Answer:
12
Explanation:
Use Order of Operations, or PEMDAS to find the order at which to solve this problem:
P - Parenthesis
E - Exponents
M - Multiplication
D - Division
A - Addition
S - Subtraction
Step 1: Solve inside the parenthesis
23-(6)-15÷3
Step 2: Complete the division
23-(6)-5
Step 3: Solve the subtraction
12