SOLUTION: (3)/(10z)+(7)/(4z) how do i find the lowest common denominator

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Question 345329: (3)/(10z)+(7)/(4z)
how do i find the lowest common denominator
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
10z=2%2A5%2Az
4z=2%2A2%2Az=2%5E2%2Az
Take the highest power of each factor for the LCD
LCD=2%5E2%2A5%2Az=20z