Question

x+x+x+x=900

Answer 1

`x+x+x+x=900`

`<=> x*(1+1+1+1) =900`

`<=> 4*x =900`

`=> x = 900/4 = 225`

Vậy `x=225`

Answer 2

`-> 4x = 900`

`-> x = 225`

Answer 3

x+x+x+x=900

=> 4x=900

=>x=900:4

x=225