Algebra equation

Question

A volleyball coach plans her daily practices to include 10 minutes of stretching, 2/3 of the entire practice scrimmaging and the remaining practice time working on drills of specific skills. On Wednesday, the coach planned 100 minutes of stretching and scrimmaging. How long, in hours, is the entire practice

Answer 1

10 min stretch

.66x scrim

x-(.66x + 10min)= drills

.66x + 10=100

.66x=90

x=135

scrim= 89.1 minutes

drills=135-89.1=45.9

stretch= 10

=145 minutes 145/60=2.4hrs.

Answer 2

100 - 10 = 90 minutes scrimmaging.

(2/3)p = 90

(3/2)(2/3)p = 90(3/2)

p = 135

135/60 = 2.25 hours, or 2 1/4 hours