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kozerog [31]
3 years ago
10

Can someone tell me how to do it, i have more problems like this​

Mathematics
1 answer:
BigorU [14]3 years ago
4 0

Answer:

\large\boxed{\dfrac{7n}{30}=\dfrac{7}{30}n}

Step-by-step explanation:

\dfrac{2n}{5}+\left(-\dfrac{n}{6}\right)=\dfrac{2n}{5}-\dfrac{n}{6}

To subtract both fractions we need a common denominator.

LCD=(5)(6)=30

\dfrac{2n}{5}=\dfrac{2n\cdot6}{5\cdot6}=\dfrac{12n}{30}\\\\\dfrac{n}{6}=\dfrac{n\cdot5}{6\cdot5}=\dfrac{5n}{30}

Therfore

\dfrac{2n}{5}-\dfrac{n}{6}=\dfrac{12n}{30}-\dfrac{5n}{30}=\dfrac{12n-5n}{30}=\dfrac{7n}{30}=\dfrac{7}{30}n

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