Câu hỏi của do tuong phuong nhi

Question

1.X:0,1+X:0,2-X:25%+X+X=2019

2 Memua 1ta ruoi gao ,me bieu ba 5 cân gao và an 2 yen ruoi nua . hoi me con bao nhieu phan tram gao

Fudo · Accepted Answer

$x\text{ : }0,1\text{ }+x\text{ : }0,2\text{ - }x\text{ : }25\%+x+x=2019$

$x\text{ : }\frac{1}{10}+x\text{ : }\frac{1}{5}-x\text{ : }\frac{1}{4}+x+x=2019$

$x\text{ x }10 +x\text{ x }5-x\text{ x }4+x+x=2019$

$x\text{ x }\left(10+5-4+1+1\right)=2019$

$x\text{ x }13=2019$

$x=2019\text{ : }13$

$x=\frac{673}{671}$

Câu trả lời:

$x\text{ : }0,1\text{ }+x\text{ : }0,2\text{ - }x\text{ : }25\%+x+x=2019$

$x\text{ : }\frac{1}{10}+x\text{ : }\frac{1}{5}-x\text{ : }\frac{1}{4}+x+x=2019$

$x\text{ x }10 +x\text{ x }5-x\text{ x }4+x+x=2019$

$x\text{ x }\left(10+5-4+1+1\right)=2019$

$x\text{ x }13=2019$

$x=2019\text{ : }13$

$x=\frac{673}{671}$

Hoàng Nguyễn Thu Phương · Answer

1.x:0,1+x:0,2-x:25%+x+x=2019

x:0,1+x:0,2-x:1/4+x:1+x:1=2019

x:(0,1+0,2-1/4+1+1)=2019

x: 41/20=2019

x=2019x41/20

x=82779/20

Vậy x=82779/20