Question

plese urgently in linenear equation.​

Answer 1

Answer:

n=12

Step-by-step explanation:

n×9=4(n+15)

9n=4n+60

5n=60

n=12

Answer 2

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n = 12

Step-by-step explanation:

$\implies \: \frac{n}{n + 15} = \frac{4}{9} \\ \\ \implies \: Do \: cross \: multiplicaton \\ \\ \implies(9 \times n) = 4(n + 15) \\ \\ \implies9n = (4 \times n) + (4 \times 15) \\ \\ \implies \: 9n = 4n + 60 \: \\ \\ \implies \: 9n - 4n \: = 60 \\ \\ \implies 5n = 60 \\ \\ \implies = \frac{60}{5} \\ \\ \implies n =12$