SOLUTION: Marco can build a lap top twice as fast as cliff. Working together, it takes them 6 hours. How long would it take Marco working alone? A) write a rational equation you could use t

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Marco can build a lap top twice as fast as cliff. Working together, it takes them 6 hours. How long would it take Marco working alone? A) write a rational equation you could use t      Log On


   

Question 1152437: Marco can build a lap top twice as fast as cliff. Working together, it takes them 6 hours. How long would it take Marco working alone?
A) write a rational equation you could use to solve this problem?
B) solve your equation
Found 2 solutions by josgarithmetic, MathLover1:
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
1%2Fm%2B1%2F%282m%29=1%2F6, time for Marco is m.
Solve for m.

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

let Marco's time be x, and Cliff's time will be 2x

Working together, it takes them 6 hours; so, rates are
1%2Fx+%2B+1%2F%282x%29+=+1%2F6........LCD 6x
6%2F6x+%2B+3%2F6x+=+x%2F6x
9%2F6x+=+x%2F6x
x=9

Answer: It will take 9+hours to complete the job working alone.