Philip pays $1,620 in rent every month. this amount is $120 more than twice what his brother paul pays for rent. how much does paul pay for rent?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.