Va rog rezolvati urmatorul exercitiu prin metoda mersului invers [(a×3+12)×5-185]÷4=475! Dau coroana!



Răspuns :

[(ax3+12)x5-185]:4=475
(ax3+12)x5-185=475x4
(ax3+12)x5-185=1900
(ax3+12)x5=1900+185
(ax3+12)x5=2085
ax3+12=2085:5
ax3+12=417
ax3=417-12
ax3=405
a=405:3
a=135