100 + x = 300 + 700
100 + x = 1000
x = 1000 - 100
x = 900
k mik di mik k ban roi
100 + x = 300 + 700
100 + x = 1000
x = 1000 - 100
x = 900
100 + x = 300 + 700
100 + x = 1000
x = 1000 - 100
x = 900
\(100+x=300+700\)
\(\Leftrightarrow100+x=1000\)
\(\Rightarrow x=1000-100\)
\(\Rightarrow x=900\)
100 + x=300 + 700
100 + x = 1000
x = 1000 - 100
x = 900
Vậy x = 900
100 + x = 300 + 700
100 + x = 1000
x = 1000 - 100
x = 900
ai tk mk mk tk lại
100 + x = 300 + 700
100 + x = 1000
x = 1000 - 100
x = 900
mik tk bn rồi nha
\(100+x=300+700\)
\(100+x=1000\)
\(x=1000-100\)
\(x=900\)
100 + x = 300 + 700
100 + x = 1000
x = 1000 - 100
x = 900