Question 925255
Work/one hour Used for Set UP
{{{1/12 + 1/18 = 1/x}}} |Multiplying thru by 36x so as all denominators = 1
3x + 2x = 36
5x = 36
x = 36/5
x = 7.2hr  0r 7hr and 12min
And...checking
{{{1/12 + 1/18 = 1/(36/5)}}}
{{{1/12 + 1/18 = 5/36}}}
{{{3/36 + 2/36 = 5/36}}}