Question

ayuda porfaaaaaaaaaaa​

Answer 1

Hola Valenth,

x: cantidad dinero inicial

x - 4/5x - (2/7)*1/5x = 20

x -4/5x - 2/35x = 20

x ( 1 - 4/5 - 2/35 ) = 20

1/7x = 20

x = 7 * 20

x = 140