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 4 minutes more to walk to work than to ride his bike to work, then x equals?
Options
A) 4 B) 6 C) 10 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 240 (which is TIME in seconds.).   Thus the correct equation is : 60*x-20*x=240----&gt; 40x=240--&gt; x = 6   Option 6
<result>B</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 4 minutes more to walk to work than to ride his bike to work, then x equals?