Solve equation (1)/(4) + (1)/(5) = (1)/(t)

Tony DiNitto asked Dec 26, 2023

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5 votes

Solve equation
(1)/(4) + (1)/(5) = (1)/(t)

Tony DiNitto asked Dec 26, 2023

2.8k points

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22 votes

$(1)/(4) + (1)/(5) = (1)/(t) \\ (1 * 5)/(4 * 5) + (1 * 4)/(5 * 4) = (1)/(t) \\ (5)/(20) + (4)/(20) = (1)/(t) \\ (9)/(20) = (1)/(t)$

I WILL USE CROSS MULTIPLICATION

$t(9) = 20 \\ 9t = 20 \\ (9t)/(9) = (20)/(9) \\ t = (20)/(9)$

GOODLUCK.

PlanetUnknown answered Dec 30, 2023

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