(31*550-Х)*120=10200

Question

(31*550-Х)*120=10200

Answer 1

1750*120-х*120=10200

210000-120х=10200

-120х= 10200-210000

-120х=-199800

х=199800:120

х=1665

Answer 2

(31*550-х)*120=10200

(17050-х)*120=10200

2046000-120х=10200

2046000-10200=120х

2035800=120х

2035800:120=х

16965=х