Question : $-7 p-[3 q-\{8 p-(4 q-10 p)\}]=?$
Option 1: $7p-11q$
Option 2: $11p-7q$
Option 3: $9p-12q$
Option 4: $12p-9q$
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Correct Answer: $11p-7q$
Solution :
$-7 p-[3 q-\{8 p-(4 q-10 p)\}]$
$= -7p -[3q-(8p-4q+10p)]$
$= -7p -[3q-(18p-4q)]$
$= -7p - [3q-18p+4q]$
$= -7p -7q+18p$
$= 11p-7q$
Hence, the correct answer is $11p-7q$.
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