In the annual walkathon, Lee jogs for 5 3/4 miles more than he walks. If he travelled a total of 15 miles, how many miles did he walk
LJ=MW-5.75
but LJ+MW=15
or LJ=15-MW
or 15-MW=MW-5.75
2MW=20.75
solve for MW
but LJ+MW=15
or LJ=15-MW
or 15-MW=MW-5.75
2MW=20.75
solve for MW