Question

mấy bnj lm ơn giúp mk vs nhé tìm x

0,2 .x+2/3.x+4.x=551

Answer 1

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

Answer 2

\(0.2\cdot x+\dfrac{2}{3}\cdot x+4\cdot x=551\)

\(\dfrac{1}{5}x+\dfrac{2}{3}x+4x=551\)

\(x\left(\dfrac{1}{5}+\dfrac{2}{3}+4\right)=551\)

\(x\left(\dfrac{3}{15}+\dfrac{10}{15}+\dfrac{60}{15}\right)=551\)

\(x\cdot\dfrac{73}{15}=551\)

\(x=551:\dfrac{73}{15}\)

\(x=\dfrac{8265}{73}\)

Vậy \(x=\dfrac{8265}{73}\).

Answer 3

\(0,2.x+\dfrac{2}{3}.x+4x=551\)

\(x\left(\dfrac{1}{5}+\dfrac{2}{3}+4\right)=551\)

\(x.\dfrac{73}{15}=551\)

\(x=551:\dfrac{73}{15}\)

\(x=\dfrac{8265}{73}\)