The first time, it jumps one unit to the left from P0 to P1. The second time, it jumps two units to the right from P1 to P2. The third time, it jumps three units to the left from P2 to P3. The fourth time, it jumps four units to the right from P3 to P4 When it jumps 100 times according to the above rule, the number represented by P100 on the number axis is exactly 2062. Find the number represented by P0, the initial position of the insect

The first time, it jumps one unit to the left from P0 to P1. The second time, it jumps two units to the right from P1 to P2. The third time, it jumps three units to the left from P2 to P3. The fourth time, it jumps four units to the right from P3 to P4 When it jumps 100 times according to the above rule, the number represented by P100 on the number axis is exactly 2062. Find the number represented by P0, the initial position of the insect

The first jump from P0 to P1 is one unit to the left, and the second jump from P1 to P2 is two units to the right, which means that jumping twice is equivalent to jumping one unit to the right. P100 = 2009, then jumping 50 units to the right after 100 times. P0 = 2009-50 = 1959, let P0 = x, right is positive direction X-1 + 2-3 + 4 -. - 99 + 100 = 2009x + (2-1) + (4-3)... + (100-9)

The first time it jumps one unit left from P0 to P1, the second time it jumps two units right from P1 to P2
When it jumps 100 times according to the above rule, the number represented by the point P100 on the number axis is exactly 2005. Find the number represented by the initial position P0 of the insect

A:
P100 is 50 units to the right of P0
So P0 = 2005-50 = 1955

At a certain point P0 of the number axis, a small insect jumps one length unit from P0 to P1 for the first time
The second jump to the right 2 length units to P2, the third jump to the left 3 length units to P3, the fourth jump to the right 4 length units to P4, and so on?

Every two jumps, is to move right 1. So 100 is equivalent to jump right 50. The starting number is 1960

Solve the equation: 4x-7 / 8 = 9 / 2 x - (7 / 15 = 1 / 3) = 2

"Ice and snow * purity" Hello, I'm glad to answer for you!
4x-7 / 8 = 9 / 2
4X = 9 / 2 + 7 / 8
4X = 43 / 8
X = 4 / 8
X = 43 / 32
X - (7 / 15 + 1 / 3) = 2
X = two and three fourths

Solution equation: (x-3 X-8) * 1 / 3 = 9 / 4x-4.5

(x-x/3-8)*1/3=4x/9-4.5
(2x/3-8)*1/3=4x/9-4.5
2x/9-8/3=4x/9-4.5
4.5-8/3=2x/9
11/6=2x/9
x=99/12

Solve the equation 1.0.4x-0.4 times 10.8 = 20, 5 / 6: x = 5 / 9:

0.4x-0.4 times 10.8 = 20
0.4（x-10.8）=20
x-10.8=20/0.4
x-10.8=50
x=50+10.8
x=60.8
5 / 6: x = 5 / 9: 2 / 5
5/9 x=5/6 X 2/5
5/9 x=1/3
x=1/3 X 9/5
x=3/5

(4x + 1) △ 0.6 = 5 solution equation

0.5

4x-36 = 6 solution equation

4x=36+6
4x=42
x=10.5

4 × 5.6-0.4x = 20

4×5.6-0.4x=20
22.4-0.4x=20
0.4x=2.4
x=6 .

Solve the equation x: 3 / 4 = 12 / 5 △ x = 3 / 10 4x-3 + 9 = 12

First question
x=12×4×3
x=144
Second question
12/5=3x/10
24=3x
x=8
The third question
4x=12+3-9
4x=6
x=1.5