Răspuns :
[tex]\Big[ (n+217)\times 2 - 248 \Big] \times 3 = 1596 \\ (n+217)\times 2 - 248 = 1596 : 3 \\ (n+217)\times 2 - 248 = 532 \\ (n+217)\times 2 = 532+248 \\ (n+217)\times 2 = 780 \\ n+217 = 780:2 \\ n+217 = 390 \\ n = 390-217 \\ n=173
[/tex]
[(x+217)×2-248]×3=1596
(x+217)×2-248=1596÷3=532
(x+217)×2=532+248=780
x+217=780:2=390
x=390-217
x=173
(x+217)×2-248=1596÷3=532
(x+217)×2=532+248=780
x+217=780:2=390
x=390-217
x=173