\(120\)\(+\)\(80\)\(=\)\(500\)\(-\)\(x\) \(100\)\(+\)\(100\)\(=\)\(400\)\(-\)\(x\)
\(200\) \(=\)\(500\)\(-\)\(x\) \(200\) \(=\)\(400\)\(-\)\(x\)
\(500\)\(-\)\(200\)\(=\)\(x\) \(400\)\(-\)\(200\)\(=\) \(x\)
\(300\) \(=\) \(x\) \(200\) \(=\) \(x\)
120 + 80 = 500 - x
200 = 500 - x
x = 300
100 + 100 = 400 - x
200 = 400 - x
x = 200
120 + 80 = 500 - x
100 + 100 = 400 - x
Ta có :
120 + 80 = 500 - x
=> 500 - x = 200
=> x = 300
Lại có :
100+100=400-x
=> 400-x = 200
=> x = 200
120 + 80 = 500 - x
<=> 500 - x = 200
x = 500 - 200
x = 300
100 + 100 = 400 - x
<=> 400 - x = 200
x = 400 - 200
x = 200
120 + 80 = 500 - x
500 - x = 200
x = 500 - 200
x = 300
Vậy x = 300
100 + 100 = 400 - x
400 - x = 200
x = 400 - 200
x = 200
Vậy x = 200
120+80=500-x
500-x=200
=>x=500-200=300
100+100=400-x
400-x=200
=>x=400-200=200
\(120+80=500-x\)
\(200=500-x\)
\(x=500-200\)
\(x=300\)
\(100+100=400-x\)
\(200=400-x\)
\(x=400-200\)
\(x=200\)
120 + 80 = 500 - x
200 = 500 - x
500 - 200 = x
300 = x
100 + 100 = 400 - x
200 = 400 - x
400 - 200 = x
200 = x