SOLUTION: Please help me answer this word problem. Selma's class is making care packages to give to victims of natural disaster. Selma packs one box in 5 minute and has already packed 12 bo

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Please help me answer this word problem. Selma's class is making care packages to give to victims of natural disaster. Selma packs one box in 5 minute and has already packed 12 bo      Log On


   

Question 1146879: Please help me answer this word problem.
Selma's class is making care packages to give to victims of natural disaster. Selma packs one box in 5 minute and has already packed 12 boxes. Her friend Trudy packs one box in 7 minute and has already packed 18 boxes. How many more minutes does each need to work in order to have the same number of boxes?




Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
.
Selma = 12 + t%2F5  boxes, where "t" is the time in minutes.


Trudy = 18 + t%2F7  boxes.


Your equation is


    Selma = Trudy,


or, equivalently,


    12 + t%2F5 = 18 + t%2F7.


Your task is to find "t" from this equation.


First step is to write it in this form


    t%2F5 - t%2F7 = 18 - 12 = 6.


Next step is to multiply both sides by 35.


Having these instructions, you should be able to complete the solution on your own.