Question 293528
Larry worked for 3 hours at the rate of 1/8 per hour.
No need for two equations.
Larry already did 3/8 of the job
Pat and Larry will work together for 2 hours, Larry at 1/8 for each hour and Pat at x per hour for 2 hours

3/8+2/8+2/x=1
5/8=2/x=1
2/x=3/8
16=3x
16/3=x
5 1/3=x
So Pat would do the whole house alone in 5 1/3 hours.
Larry had already done 3/8 with pat he did 2/8. So Larry did 5/8 and Pat did 3/8
of the total job.

Larry worked 5 hours total.
5/8+3/8=1