0,2.x+2/3.x+4=551
1/5.x+2/3.x+4=551
x.(1/5+2/3+4)=551
x.73/15=551
x=551: 73/15
x=8265/73
\(0.2\cdot x+\dfrac{2}{3}\cdot x+4\cdot x=551\)
\(\dfrac{1}{5}x+\dfrac{2}{3}x+4x=551\)
\(x\left(\dfrac{1}{5}+\dfrac{2}{3}+4\right)=551\)
\(x\left(\dfrac{3}{15}+\dfrac{10}{15}+\dfrac{60}{15}\right)=551\)
\(x\cdot\dfrac{73}{15}=551\)
\(x=551:\dfrac{73}{15}\)
\(x=\dfrac{8265}{73}\)
Vậy \(x=\dfrac{8265}{73}\).
\(0,2.x+\dfrac{2}{3}.x+4x=551\)
\(x\left(\dfrac{1}{5}+\dfrac{2}{3}+4\right)=551\)
\(x.\dfrac{73}{15}=551\)
\(x=551:\dfrac{73}{15}\)
\(x=\dfrac{8265}{73}\)
