SOLUTION: Solve V = 1/3Bh for B if V=112 and h=7 I able to set up the problem, but am getting confused on how to muplity the fraction with the variable. Thanks!!

Algebra ->  Equations -> SOLUTION: Solve V = 1/3Bh for B if V=112 and h=7 I able to set up the problem, but am getting confused on how to muplity the fraction with the variable. Thanks!!      Log On


   

Question 74734This question is from textbook Elementary algebra
: Solve V = 1/3Bh for B if V=112 and h=7
I able to set up the problem, but am getting confused on how to muplity the fraction with the variable. Thanks!! This question is from textbook Elementary algebra

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
V+=+1%2F3Bh
112+=+1%2F3B%287%29Plug in V=112 and h=7
112%2F%281%2F3%29=B%287%29Divide both sides by 1%2F3. When you divide a fraction, you multiply its reciprocal. In other words, if I have 2%2F%281%2F2%29 I flip the 1%2F2 and I multiply it by 2 2%2F%281%2F2%29=2%282%2F1%29=4
112%2A%283%2F1%29=B%287%29
336=B%287%29Divide both sides by 7
336%2F7=B
B=48


Check:
112+=+1%2F3%2848%29%287%29
112+=+16%287%29
112+=+112works