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Problem 1 Hard Difficulty

If $\frac{x-1}{3}=k$ and $k=3,$ what is the value of $x ?$
A) 2
B) 4
C) 9
D) 10

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RT

Ruth T.

May 20, 2020

RT

Ruth T.

May 20, 2020

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Video Transcript

So this one already tells us the value of K s. I'm just gonna go and put that into the equation. That gives me X minus one over three, equal to three. So then, if we want to isolate X, I'm going to go and multiply by three on both sides so that we could get rid of that fraction because that makes it easier to work with. Because then this in this castle up. So we're just left with X minus one is equal Thio nine, because three times three is nine. And finally, I was gonna add one to both. Science giving us X is equal to ten.