Rewrite the expression from Part B to get the variable b alone on one side of the equation. (This is also called isolating b.) part b= b-2=n

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.