If $\dfrac1{x}+\dfrac13+\dfrac14=1,$ then $x =$

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Re: If $\dfrac1{x}+\dfrac13+\dfrac14=1,$ then $x =$

by Scott@TargetTestPrep » Tue Oct 27, 2020 9:04 am

VJesus12 wrote: ↑
Tue Oct 20, 2020 2:39 am
If $\dfrac1{x}+\dfrac13+\dfrac14=1,$ then $x =$

A. $2$

B. $\dfrac{24}{11}$

C. $\dfrac{12}5$

D. $5$

E. $6$

Answer: C

Solution:

Multiplying the equation by 12x, we have:

12 + 4x + 3x = 12x

12 = 5x

12/5 = x

Answer: C

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