Equations involving rational expressions | Mathematics | Page 1

dreamy moon Oct 26, 2022, 11:00 AM

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This equation(t/15 - t/20 = 1) made my head stop working.
How do I solve it?

dreamy moon Oct 26, 2022, 11:22 AM

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<@&727457814523674674>

junior kindle Oct 26, 2022, 11:22 AM

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multiply both sides by 60

dreamy moon Oct 26, 2022, 11:24 AM

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wait what?

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where did 60 came from?

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and does that preserve the equality?

old ether Oct 26, 2022, 11:25 AM

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you can do literally anything to both sides and equality is preserved

old ether Oct 26, 2022, 11:25 AM

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its the lowest common demoinator between 15 and 20

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try multiplying both sides by 60 and see what you can do from there

dreamy moon Oct 26, 2022, 11:28 AM

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okay then

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so the lcd makes it easier to solve equations like this

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(I wonder why)

dreamy moon Oct 26, 2022, 11:31 AM

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What else do I need to know?

junior kindle Oct 26, 2022, 12:18 PM

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now the equation becomes
4t - 3t = 60

dreamy moon Oct 26, 2022, 12:19 PM

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and it results to t = 60

#Equations involving rational expressions