100x + 100 = 900
100x = 900 - 100
100x = 800
x = 800 : 100
x = 8
100x + 100 = 900
100x = 900 - 100
100x = 800
x = 800 : 100
x = 8
100x + 100 = 900
100x = 900 - 100
100x = 800
x = 800 : 100
x = 8
100x + 100 = 900
100x = 900 - 100
100x = 800
x = 800 : 100
x = 8
100x+100=900
100x=900-100
100x=800
x= 800:100
x= 8
tk nhé
\(100x+100=900\)
\(100x\) \(=900-100\)
\(100x\) \(=800\)
\(x=800:100\)
\(x=8\)
100x + 100 = 900
100 .( x + 1 ) = 900
x + 1 = 900 : 100
x + 1 = 9
x = 9 - 1
x = 8