Question

$\frac{n}{2} + \frac{n}{5} = 7$
solve this​

Answer 1

Step-by-step explanation:

n/2+n/5=7

=>(5n+2n)/10=7

=>7n/10=7

=>7n=10×7

=>7n=70

=>n=70/7

=>n=10

Answer 2

Answer:

$\frac{n}{2} + \frac{n}{5} = 7 \\ \frac{5n + 2n}{10} = 7 \\ \frac{7n}{10} = 7 \\ n = 7 \times \frac{10}{7} \\ {\boxed{n = 10}}$

hope it helps you