What should be subtracted from -78 so as to get 512 ?

Concept-The total number of pencils Ram and Raj each have is 3, and Raj has 4, thus after giving Ram two pencils, Raj would have 4-2=2 pencils remaining. As a result, after receiving two pencils from Raj, Ram will have four pencils overall.Ram will have 5 pencils (3 + 2 = 5).Consider the following question: Find a number that should be deducted from -78 in order to obtain 512 It will be convenient to represent this condition analytically, i.e. (-78)-x= 512, if the number from which we must be subtracted is x.BODMAS stands for, to use the BODMAS rule as a shorthand,BO: Open bracketDivision, DM: MultiplyingA: AddingR: Reduction[1]The terms listed above are used in the order that was previously mentioned. Therefore,(-78)−x=512 (-78) − 512=x(-7×3-5×224) =xFurther solving it yields (-21-1024)=x(-3124)=x.Therefore, option 3 is accurate, meaning that -78 must be deducted from -3124 to reach 512.

What should be subtracted from -78 so as to get 512 ?

Concept-The total number of pencils Ram and Raj each have is 3, and Raj has 4, thus after giving Ram two pencils, Raj would have 4-2=2 pencils remaining. As a result, after receiving two pencils from Raj, Ram will have four pencils overall.Ram will have 5 pencils (3 + 2 = 5).Consider the following question: Find a number that should be deducted from -78 in order to obtain 512 It will be convenient to represent this condition analytically, i.e. (-78)-x= 512, if the number from which we must be subtracted is x.BODMAS stands for, to use the BODMAS rule as a shorthand,BO: Open bracketDivision, DM: MultiplyingA: AddingR: Reduction[1]The terms listed above are used in the order that was previously mentioned. Therefore,(-78)−x=512 (-78) − 512=x(-7×3-5×224) =xFurther solving it yields (-21-1024)=x(-3124)=x.Therefore, option 3 is accurate, meaning that -78 must be deducted from -3124 to reach 512.

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What should be subtracted from $\frac{- 7}{8}$ so as to get $\frac{5}{12}$ ?

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\frac{31}{24}

\frac{8}{5}

\frac{- 31}{24}

\frac{- 6}{8}

answer is C.

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Detailed Solution

Concept-The total number of pencils Ram and Raj each have is 3, and Raj has 4, thus after giving Ram two pencils, Raj would have 4-2=2 pencils remaining. As a result, after receiving two pencils from Raj, Ram will have four pencils overall.Ram will have 5 pencils (3 + 2 = 5).
Consider the following question: Find a number that should be deducted from

\frac{- 7}{8}

in order to obtain

\frac{5}{12}

It will be convenient to represent this condition analytically, i.e. (

\frac{- 7}{8}

)-x=

\frac{5}{12}

, if the number from which we must be subtracted is x.
BODMAS stands for, to use the BODMAS rule as a shorthand,
BO: Open bracket
Division, D
M: Multiplying
A: Adding
R: Reduction[1]
The terms listed above are used in the order that was previously mentioned. Therefore,
(