Answer:
20
Explanation:
from: BODMAS
Bracket
Of
Division
Multiplication
Addition
Subtraction
We first deal with brackets, division and then subtraction last.
13 - 2 (1- 15) ÷ 4
13 - 2(-14) ÷4
13 -(-28÷4)
13 - (-7)
13 +7
= 20
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