x+300=400-400+500.1
x+300=400-400+500
x+300=0+500
x+300=500
x=500-300
x=200
=>x=200
x + 300 = 400 - 400 + 500.1
x + 300 = 0 + 500.1
x + 300 = 500
x = 500 - 300
x = 200
x+300=400-400+500.1
x+300=0+500
x+300=500
x=500-300
x=200
x + 300 = 400 - 400 + 500,1
x + 300 = 500,1
x = 500,1 - 300
x = 200,1
nha Chicchana Mune No Tokimeki thuy linh
\(x+300=400-400+500.1\)
\(x+300=400-400+500\)
\(x+300=0+500\)
\(x+300=500\)
\(x=500-300\)
\(x=200\)
\(Vậy\)\(x=200\)