jack usually mows his lawn in 6 hours marilyn can mow the same yard in 7 hours. how much time would it take for them to mow the lawn together Please write the problem solution in the solution text box; do not attach files. Also, do not post short title without the actual solution (to be appended later). Post the answer right away. I need the answers with all the steps (including equations) shown. Thanks!

1/6 + 1/7 = 13/42

it take for them to mow the lawn together = 42/13