A rope is left three feet around the tree three times, and four feet less than four feet around the

Solution 1: If the length of the rope is x feet and the circumference of the tree is y feet, then there are three circles around the tree and three feet left to get x y=3....3, from four circles around the tree less than four feet, x y=4....

4. After the two are finished, it is, 3y+3=x, 4y-4=xSubtract the left and right of the two to get y-7=0, so y=7, x=24. So the circumference of the tree is 7 feet, and the rope is 24 feet long.

Method 2: Because the length of the rope is fixed, when it is wrapped three times, there are four feet left, and then after another circle, there are four feet less, then these three feet plus four feet can just wrap the fourth circle full. So the circumference of the tree is 7 feet. The rope is 3x7+3=24 feet.

That's it!!

Because three laps are more than 30 centimeters, if you circle the tree four times, the difference is 40 centimeters.

That is, a lap should be 30 + 40 = 70

The rope length is 3*70+30=240

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If the tree is circumferential x feet, then 3x+3=4x-4 x=7, then the rope is 24 feet long.

The calculation process is as follows:

3 (m) 13 (m).

A: The rope is 13 meters long.

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First, find the length of a circle around the tree according to the conditions.

From 1 meter more around 4 circles, 2 meters less around 5 circles, then 1 + 2 = 3 meters will be used for 1 circle.

The length of this rope = 3 4 + 1 = 13 meters.

A circle around the tree is 1 2 3 meters.

The length of the rope is 3 4 1 13 meters.

Let the rope be meters long, according to the inscription: (x-1) 4=(x+2) 5, solve the equation x=13, and the rope is 13 meters long.

If the circumference of the trunk is x meters, then the rope is (4x+1) meters long.

According to the title, there are:

4x+1=5x－2

The solution is x=3 so the trunk circumference is 3 meters, and the rope length is 4x3 1=13 meters.

Solution: Set the circumference of the tree pole to be x meters.

4x+1=5x-2

5x-4x=1+2

x=34x+1=4×3+1=13

A: This rope is 13 meters long.

Let the perimeter of the tree be x

4x+1=5x-2

x = 34 3 + 1 = 13 meters.

A: The rope is 13 meters long.

If the circumference of the trunk is x m, then the rope is (4x+1) or (5x-2) m.

According to the title, it is called:

4x+1=5x－2

Solution: x=3Answer: The circumference of the trunk is 3 meters, and the length of the rope is 4x3 1=13 meters.

Solution: From the meaning of the question, it can be seen that it takes 3 meters for a rope to circle the tree, then, 4 3 + 1 13 (meters).

A: The length of this rope is 13 meters.

1+2=3 (m).

3 4 + 1 = 13 (m).

Answer: This rope is 13 years long.

The circumference of the tree is x meters.

The length of the rope can be equationed.

4x+1＝5x-2

5x-4x＝1+2

x＝34x+1＝13

This rope is 13 meters long.

Solution: Let the circumference of the trunk be x meters.

5x-2=4x+1

5x-4x=3

x=3 rope length:

4x3+1=13 (m).

According to the inscription, you can rush to the rope Shen Qishi -3 tree = 4, 4 tree - rope = 6, and the addition can have a tree wandering around = 4 + 6 = 10, so the length of the rope is 4 + 3 10 = 34 meters.

Three circles around the tree, more than 3 meters; Four circles around the tree, a difference of four meters.

It means that 3+4 is exactly 1 circle, so = circumference (4+3) (4-3) = 7 meters.

Rope length = 7 * 3 + 3 = 24 meters of wax crack.

The circumference of the tree = 3 + 4 = 7 feet.

Rope length = 3 7 + 3 = 24 feet.

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Set the tree in a lump of chains to rent x centimeters.

3x+30=4x—40

30 + 40 = 4x - 3x of shed demolition

x=7070*3+30=240 (Yuhe cm).

According to the inscription, you can get rope-3 tree = 6,5 tree-rope = 2, and you can get 2 tree holding sedan chair = 6 + 2 = 8, and the circumference of the tree is 4 meters, and the rope length is 6 + 4 3 = 18 meters.

The circumference of the tree is n

3n+6=5n-2

Get n = 4 m cherry blossom mold branches, yard suspicion.

The circumference of the tree is 4 m, and the length of the rope has a ridge sensitivity = 3n + 6 = 18 m, or 5n-2 = 18 m.

Tree circumference x rope length y

3*x+2=y

4*x-3=y

Solution. x=5

y=17, so the circumference of the tree is 5 meters.

It should be 4 feet less than 4 feet around the lap so that it can be calculated.

Set: The circumference of the tree is x feet, and the rope length is (3x+3) or (4x-4) feet.

3x+3=4x-4 x=7 (ruler, tree circumference).

3 7+3=24 (ruler, rope length) or 4 7-4=24 (ruler, rope length).

Answer: The circumference of the tree is only 7 feet, and the rope length is 24 feet.

This is a question of a system of ternary equations.

Let the length of the rope be x, then according to the meaning of the problem, you can sell to get two equations:

3x+7=3πx

4x+4=4πx

Solution: x=7, the length of the rope is quietly 7 meters.