SOLUTION: Solve the following problem algebraically. That is, set up an equation and solve it. Be sure to label clearly what the variable represents. A bricklayer can complete a wall in 7

Algebra ->  Rate-of-work-word-problems -> SOLUTION: Solve the following problem algebraically. That is, set up an equation and solve it. Be sure to label clearly what the variable represents. A bricklayer can complete a wall in 7      Log On


   

Question 364018: Solve the following problem algebraically. That is, set up an equation and solve it. Be sure to label clearly what the variable represents.
A bricklayer can complete a wall in 7 days, whereas his assistant can do the same size wall in 3 days. Working together, how long will it take for them to complete the wall?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = # days two of them would take to finish a wall. Then
x%281%2F7%2B1%2F3%29+=+1,
x%2A%2810%2F21%29+=+1,
x+=+21%2F10, or 2.1 days.