Question

Решите уравнение 20(10-x)-200(9-x)=2000

Answer 1

20(10 - x) - 200(9 - x) = 2000

200 - 20x - 1800 + 200x = 2000

180x - 1600 = 2000

180x = 2000 + 1600

180x = 3600

x = 3600 ÷ 180

x = 20