Answer:
13
Step-by-step explanation:
15 - 4 + 7 - 5 = 13
Simply expand the brackets and subtract and add accordingly.
15 - 4 + ( 7 - 5)
remember the order of operations
simplify parenthesis first
15 - 4 + ( 7 -5 )
15 - 4 + ( 2 )
now solve in order ( from left to right)
15 - 4 + 2
11 +2
