solve for each variable: solve p = a + b + c for b

[bryansherburne]

I am trying to understand how this problem is solved! I will give how the book solved it. I don't understand it
p=a+b+c for b

a+b+c=p
a+b+c-b-c+p-b-c
a=p-b-c

Help!

Thanks

 

[arthur ohlsten]

Re: solve or each variable

from the equation you see what p equals
p equals a plus b plus c

new question ! What does b equal?

given:
p=a+b+c
let us obtain b on one side of the equal sign by itself. subtract a from each side of the equal sign
p-a=b+c
subtract c from each side of the equal sign
p-a-c=b answer
b equals p minus a minus c answer in words

Arthur

 

[bryansherburne]

Re: solve or each variable

Thank you Arthur!