MATH
Solving Problems Involving System of Linear Equations (Work problems)

Ex.

In a day,Rey can plow 1/4 of a ricefield and Rolly can plow 1/6 of it.If they worked together,how long will it take them to plow vthe whole field?

(1/4+1/6=1/t)12t

3t+2t=12
5t = 12
5t/5 = 12/5
t=2 2/5 days