Question

Решить уравнение х:(х+100)*100=20

Answer 1

x
---------- * 100 =20
x+100

100 x
----------=20
x+100

100x=20(x+100)
100x=20x+2000
100x-20x=2000
80x=2000
x=2000:80
x=25
Ответ : 25