Question

165= 1/2 (n+12) x 15​

Answer 1

Answer:

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Answer 2

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$165 = \frac{1}{2} (n + 12) \times 15$

$165 \times 2 = (n + 12) 15$

$330 = (n + 12)15$

$330 = 15n + 180$

$330 - 180 = 15n$

$15n = 150$

$n = \frac{150}{15}$

$n = 10$

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