Question

tìm x > 1 biết : 5x(x - 2000)-x+2000=0

Answer 1

5.(x - 2000) - x + 2000 = 0

5.x - 10000 - x + 2000 = 0

5x - 10000 - x = -2000

4x = -2000 + 10000

4x = 8000

x = 2000