\(x:2+250.4=55.61+69.55-45.37-93.45\)
\(\Leftrightarrow x:2+1000=55\left(61+69\right)-45\left(37+93\right)\)
\(\Leftrightarrow x:2+1000=55.130-45.130\)
\(\Leftrightarrow x:2+1000=130\left(55-45\right)\)
\(\Leftrightarrow x:2+1000=130.10\)
\(\Leftrightarrow x:2+1000=1300\)
\(\Leftrightarrow x:2=1300-1000=300\)
\(\Leftrightarrow x=300.2=600\)
Vậy \(x=600\)
X:2+250*4=55*61+69*55-45*37-93*45
X:2+250*4=(55*61+69*55)-(45*37+93*45)
X:2+1000=55*(61+69)-45*(37+93)
X:2+1000=55*130-45*130
X:2+1000=(55-45)*130
X:2+1000=10*130
X:2+1000=1300
X:2=1300-1000
X:2=300
X=300*2
X=600
Vậy X = 600
