Question 886752
Two people can cut one lawn in 5 hour; on their own, it takes approximately twice that, so 10 hours.
10 hours + 10 hours = 20 hours
A + B = 20
A = B+1
Substitute the value of A
(B+1) + B = 20
2B + 1 = 20
Subtract
2B = 19
B = 9.5
If B = 9.5 and A is an hour slower, A = 10.5
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The faster person can cut the lawn by himself in {{{highlight_green(9.5hours)}}}