Answer: 35minutes
Explanation:
Minutes spent reading = x
Minutes spent doing homework =2(x+5) = 2x + 10
Minutes spent playing video games = 25minutes
Total minutes used = 140 minutes
x + 2x + 10 + 25 = 140
3x + 35 = 140
3x = 140 - 35
3x = 105
x = 105/3
x = 35 minutes