SOLUTION: 1/3(b+12)-1/4(b+12)

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Question 157207: 1/3(b+12)-1/4(b+12)
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
1/3(b+12)-1/4(b+12)
Distribute,
b%2F3%2B12%2F3-b%2F4-12%2F4=0
b%2F3%2Bcross%2812%294%2Fcross%283%291-b%2F4-cross%2812%293%2Fcross%284%291
%284b-3b%29%2F12%2B4-3=0
%28b%2F12%29%2B1=0, transpose
b%2F12=-1, cross multiply
b=-12 -------------> final answer
.
Other way of solving it (as per your textbook):
%281%2F3%29%28b%2B12%29-%281%2F4%29%28b%2B12%29
Factor out %28b%2B12%29:
%28b%2B12%29%28%281%2F3%29-%281%2F4%29%29
%28b%2B12%29%28%284-3%29%2F12%29
%28b%2B12%29%281%2F12%29
highlight%28%28b%2B12%29%2F12%29%29 ------------> same answer from textbook
If continue solving it, cross mutiply
%28b%2B12%29=%2812%29%280%29
b%2B12=0, transpose and change sign,
b=-12 -----------------> same as answer on the 1st one above.
Thank you,
Jojo