Youseff lives x blocks from his office. It takes him 1 minute per block to walk to work and 20 seconds per block to ride his bike to work. It is takes him exactly 6 minutes more to walk to work than to ride his bike to work, then x equals?  Choose the correct choice
A) 4 B) 7 C) 9 D) 15 E) 20
Please follow posting guidelines, link is in my signatures.   As for your question, x/60 = blocks/time/block = block^2/time . This is not what you want. You are given x blocks and 60 seconds PER BLOCK. Thus you need to put it as 60*x to give you units of seconds as you are equating this to 360 (which is TIME in seconds.).   Thus the correct equation is : 60*x-20*x=360 ----&gt; 40x=360--&gt; x = 9.   option 9
<result>C</result>
Youseff lives x blocks from his office. It takes him 1 minute per block to walk to work and 20 seconds per block to ride his bike to work. It is takes him exactly 6 minutes more to walk to work than to ride his bike to work, then x equals?