Question

25+[{(9-8+4)÷(-2-1-2)}-20]​

Answer 1

you have to use the bodmas {bracket of division multiplication addition and subtraction} rule and substitute and the answer is 0

Answer 2

25+[{(9-8+4)÷(-2-1-2)}-20]

25+[{-3÷-5}-20]

25+[3/5-20]

25+[3-100/5]

25+-97/5

125-97/5

28/5