Question

va rog rapid!dau coroana​

Answer 1

Răspuns:

n = -18

Explicație pas cu pas:

$\frac{ - n - 3}{ - 2 + 5} = \frac{ - 2 + n}{3 - 7} \iff - \frac{n + 3}{3} = - \frac{n - 2}{4} \\ - 4(n + 3) = - 3(n - 2) \iff 4(n + 3) = 3(n - 2) \\ 4n + 12 = 3n - 6 \iff n = - 6 - 12\\ \implies \bf x = - 18$

Answer 2

$\frac{-n-3}{-2+5} =\frac{-2+n}{3-7} \\\frac{-n-3}{3} =\frac{-2+n}{-4} \\\\-4(-n-3)=3(-2+n)\\4n+12=-6+3n\\\\4n-3n=-6-12\\n=-18$