×+60=54000×3;360+×=125200:20​

Решение и :

x + 60 = 54 000 · 3

x + 60 = 162 000

x = 162 000 - 60

x = 161 940

360 + x = 125200 ÷ 20

360 + x = 6 260

x = 6 260 - 360

x = 5 900