Kneel down and beg the math master to solve this application problem in the sixth grade

Set the original plan to arrive in x hours.

x = hours. The two places are 10 kilometers apart.

The question of profit and loss...

10 kilometers per hour, in the original planned time, more travel: 10 kilometers.

9 km/h, 9 km less than planned.

Difference: 5+ km.

Difference per hour: 10-9 = 1 km.

The original scheduled time was hours.

AB distance is: (km.

Set the original plan to arrive in x hours.

10（x-1/2）=9（x+1/2）

Hour. The distance between the two places is 10*(km.

Solution: Set the original plan to arrive in x hours.

30min=

10（10x-5=9x+

x=hour) 10 km).

A: ...

Let a b be the distance between the two places y km? Originally scheduled to arrive in x hours.

x-y/10=

y/9-x=x=

Solution: Let AB and the two places be separated by xkm

Then x 10+ can solve x = 90km

The original scheduled time is x 10+ or x can be found as hours!

320-40-(40-5)=245

3.Untie; There are x people in the class. 1/3x-1/5x=2 x=15 15x1/5=3

After that, write the questions yourself, it's very simple! Use your brain. You can't always ask for help.

200 (2+9+9)=10 people. 10 9 = 90 people per serving. 90 (1-1/4) = 120 players in the changed team A.

Original A 200-120 = 80 people. Original B.

Let A have x people, and B has 200-x people.

1 4 of the number of players in team A is transferred to team B.

A x * (1-1 4) = 3 x 4

B 200-3x 4

Team B has more people than Team A has 2 9,200-3x 4) (3x 4) = 1 + 2 9 = 11 99 (200-3x 4) = 11 (3 x 4).

1800-27x/4=33x/4

15x=1800

x=120, so A originally had 120 people.

If team A has x people, then team B has 200-x people.

200-x+1/4x)=3/4x(1+2/9)3/4x(1+11/9)=200

x=120

a (white) = b (black) that is.

a (black) = b (white).

c (white) = "1" times 2 5 = 2 5

I hope that everyone will encourage and encourage to vote for it

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3.Taxable: 500*.

After paying taxes, you can get back a total of 500+500*yuan.

4.Interest after three years: 100,000*.

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5.Taxable: 3000*RMB.

Interest: $3,000*.

6.Interest to be paid: 5000*.

After paying taxes, you can get back a total of 5000+5000* yuan.