Two fifths of a meter is used for the first time, and the remaining two fifths are used for the second time. There is 6m left. How long is the wire?

Two fifths of a meter is used for the first time, and the remaining two fifths are used for the second time. There is 6m left. How long is the wire?

(x-2/5)÷(1-2/5)=6
x-2/5=10
X = 10.4m

A wire is 8 meters long. It took 4.2 meters for the first time and 3 meters for the second time. How many meters are left?

8-4.2-3 = 0.8m
0.8 meters left

A wire is cut into three sections. The first section accounts for 1 / 3 of the total length, the second section accounts for 2 / 5 of the total length, and the third section is 6.4m. How long is the wire?
In Qianjiang farm, 80% of the chickens are equal to 3 / 5 of the ducks, with 1200 ducks?

First, the score of the third segment in the total length: 1-1 / 3-2 / 5 = 4 / 15
According to the length of the third section, the total length is 6.4 / (4 / 15) = 24m
First, 3 / 5: 1200 * 3 / 5 = 720 ducks
According to the fact that 80% of the number of chickens is equal to 3 / 5 of the number of ducks, the number of chickens = 720 / 80% = 900
So 900 chickens

One wire is 36 meters long, the other is 24 meters long. Cut off the same length. The first wire is three times as long as the second one. How many meters are left in each wire?

（36-24）÷（3-1）=12÷2=6
6×3=18
There are 18 meters left on one wire and 6 meters left on the other

After cutting 40% of the total length of a wire, it is connected with 24 meters, which is 20% longer than before. The original wire is several meters long

The original length is x meters
（40+20）% * X=24
60%*X=24
X=24*100/60
x=40
A: the original wire is 40 meters long

For a wire, one third of its total length was used for the first time, and 40% of its total length was used for the second time, which is 9 meters more than that for the first time. How long is this wire

9 (40% - 1 / 3) = 135 (m)

For a wire, 40% of the total length is used for the first time, and 18 meters is used for the second time. At this time, the ratio of the length to the remaining length is 3:2. How many meters is the total length?

The ratio of the used length to the remaining length is 3:2, that is, 3 / (3 + 2) = 60%
So the second time: 60% - 40% = 20%,
That is, 20% of the wires are 18 meters
So wire length: 18 / (20%) = 90 meters

For a wire, cut one-third of its total length for the first time, and subtract the remaining one-third for the second time, leaving 40 meters. How long is the wire?

For the first time, one third of the total length of the wire was cut off, and the remaining one-third was subtracted for the second time, leaving 40 meters. How long is the wire
1-1/3=2/3 2/3*1/3=2/9
1/3+2/9=5/9
1-4/9=5/9
40/5/9=72

For a wire, cut 3.5 meters in the first time, cut the remaining 29 meters in the second time, and there are still 14 meters left. How long was the wire originally?

14 (1-29) + 3.5, = 14 (79) + 3.5, = 18 + 3.5, = 21.5 (m); a: the original length of this wire was 21.5 M

25% of a wire and 120 meters. How many meters is left?

Let the total length be XM, and the equation is: x + 120 = X-1 / 3x, x = 288, the rest is 1 / 3 × 288 = 96m