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Q.


Simplify the like terms in 21b – 32 + 7b – 20b. The final expression is:

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a

8b – 32

b

8b – 60

c

8b – 23

d

8b – 40 

answer is A.

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Detailed Solution

Given an expression 21b – 32 + 7b – 20b.
Rearrange the variable and constant together,
= 21b + 7b – 20b -32
= (21 + 7 – 20)b -32
Now, using addition operation
= 8b – 32
The simplified expression is 8b – 32.
Hence, option 1 is correct.
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