(x+2859)×2=2830×2(x+2859)×2=2830×2
(x+2859)×2=11660(x+2859)×2=11660
x+2859=11660:2x+2859=11660:2
x+2859=5830x+2859=5830
x=5830−2859x=5830-2859
x=2971
( x + 2859 ) x 2 = 5830 x 2
Vì cả 2 bên đều nhân thêm 2
=> x + 2859 = 5830
=> x = 2971
( x + 2859 ) x 2 = 5830 x 2
( x + 2859 ) x 2 = 11660
x+2859=11660:2
x+2859=5830
x=5830-2859
x=2971