Question

21-3(b-7)=b+20
can someone please answer this...​

Answer 1

Answer:

-5

Step-by-step explanation:

21-3(b-7)=b+20

=> 21-3b-21=b+20

=> -3b=b+20

=> -3b-b=20

=> -4b=20

=> b= -20/4= -5

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Answer 2

21 -3(b-7) =b+20

21-3b+21=b+20

21+21-20= b+3b

22=4b

b=22/4

b=11/4

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