Question

A)  [200-(64+x*12+2*11)]*(50-24*2+13*5-9*5)=1980

Answer 1

(200-64+12x+22)(50-48+65-45)=1980
(158+12x)=90   x=-68/12=-17/3

Answer 2

[200-(64+x*12+2*11)]*(50-24*2+13*5-9*5)=1980
iei prima paranteza
64+12x+22=86+12x
paranteza dreapta va deveni
200-(86+12x)=200-86-12x=114-12x
acum iei a 2-a paranteza
50-24*2+13*5-9*5=50-48+65-45=22
Exercitiul tau va deveni
(114-12x)*22=1980 ⇒imparti prin 22 si vei obtine
114-12x=90
-12x=-24 ⇒imparti prin -12 si vei obtine
⇒x=2