Question

Simplify : 15 - [3+{5-(-7)}]

Answer 1

Answer:

$15 - (3 + (5 - ( - 7))) \\ = 15 - (3 + (5 + 7) \\ = 15 - (3 + 12) \\ = 15 - (15) \\ = 15 - 15 \\ = 0$

this method is according to the BODMAS

hope it will be helpful

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Answer 2

Answer:

is x

Step-by-step explanation:

15 - [3 + {5 - (x-7)}]

Using BODMAS

= 15 - {3 + (5 - x + 7)}

= 15 - {3 + (12 - x)}

= 15 - (3 + 12 - x)

= 15 - (15 -x)

= 15 - 15 + x

= x