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2 years ago

How do you solve this 21 = 14 + 7x

Mathematics

1 answer:

pav-90 [236]2 years ago

7 0

Answer:

subtract 14 from each side

7=7x

x=1

Step-by-step explanation:

plz brainliest!

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$\begin{gathered} Vbu=70-ax \\ Vbk=20+ax \\ \text{where:} \\ a=0.05 \\ Vbu=70-0.05x \\ Vbk=20+0.05x \end{gathered}$

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$\begin{gathered} Vbu=Vbk \\ 70-0.05x=20+0.05x \\ \text{Solve for x:} \\ 0.1x=70-20 \\ 0.1x=50 \\ x=\frac{50}{0.1} \\ x=500 \end{gathered}$

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