Question

400-(18+705/x)*4=28*5 помогите решить

Answer 1

400-(18+705/Х) х 4 = 28 х 5

400 -(72 + 2820/Х)=140

72 + 2820/Х = 400 -140

72 + 2820/Х = 260

2820/Х= 260-72

2820/Х = 188

Х=2820 : 188

Х=15 Проверяем

400 - (18+705 :15) х 4 = 140
140=140

Answer 2

400 - (18 + 705/х)*4 = 28 * 5

400 -  72 - 2820/х = 140

- 2820/х = 140 - 400 + 72

- 2820/х = - 188

х = 2820 : 188

х = 15

Ответ: х = 15

Проверка:

400 - (18 + 705/15) * 4 = 28 * 5

400 - 72 - 188 = 140

140 = 140