Question

afla valuarea termenului necunoscut: (n-45:9)×3=2185-2164

Answer 1

$\it (n- \frac{45}{9} ) \cdot 3 = 2185 - 2164 \Rightarrow (n-5) \cdot 3 = 21 \Rightarrow (n-5) = \dfrac{21}{3} \Rightarrow n-5 = 7 \Rightarrow \boxed{n= 12}$

Answer 2

n-5=3 x 26
n-5=78
n=78+5
n=83