Question

90(8х-4)=20(10 х+2582) 

Answer 1

90*(8х-4)=20*(10х+2582)

720х-360=200х+51640

720х-200х=51640+360

520х=52000

х=52000:520

х=100.

Answer 2

90(8х-4)=20(10х+2582)

720х-360=200х+51640

720х-200х=51640+360

520х=52000

х=52000:520

х=100

проверка:

90(8*100-4)=20(10*100+2582)

71640=71640