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1/4 + 1/5 = 1/t

Guest Mar 4, 2018
 #1
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1/4 + 1/5 = 1/t, solve for t

The LCD of 4, 5 = 20

[(1*5) + (1*4) ] / 20 = 1/t

[ 5 + 4 ] / 20 = 1/t

 9 / 20 =1/t   cross multiply

9t = 20         divide both sides by 9

t = 20 / 9

Guest Mar 4, 2018

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