Please come up with ten sixth grade one dimensional equations

Hello, the blue sky that can't be erased:

Solution: Let the original specified time be x hours, according to the topic.

12×[x+(20/60)]=14×(x-1)12x+4=14x-14

14x-12x=4+14

2x=18x=9So,14 (x-1)=14 (9-1)=112Answer: The original stipulated time was 9 hours; The distance between A and B is 112 km.

Set the specified time to be x hours, and set the distance between ab and the two places to y

Then we get the system of equations: y 12 = x + 1 3

y 14=x-1 after subtraction.

The solution is y=112x=9

(1) Let the original specified time be tmin, according to the title:

12(t-20)=14(t+60)

Solution: t=540min=9h

2) The distance between the two places is:

14*8=112km

Solution: Set the original time to x hours.

20 minutes = 1 3 hours.

12*（x+1/3）=14（x-1）

12x+4=14x-14

2x=18x=914*（9-1）=112（km）

A: The original regulation was 9 hours, and the distance between A and B was 112km.

I don't know how to ask me!!

Solution: Set the specified time to x

12*(x+20)=14*(x-60) (1 hour equals 60 minutes, * represents the multiplication sign).

The solution is x=540

Then the distance is equal to 12 * (540 + 20) = 6720 A: The original stipulated time is 540 minutes, and the distance between A and B is 6720 kilometers.

This problem can be solved without equations.

You can make it with a ratio.

You give it a try. If you don't, you can ask me.

a6n+4y=3y-3m

4y-7y=-3m-6n

3y=-3m-6n

y =m+2n

The gene of the front ruler is y=1

The shooting is m+2n=1

The title seems a little wrong, right?。。。

In the first year, the profit of factory A is 100 million, and B is 10-x billion.

Therefore, x=6

In the first year, the profit of factory A was 600 million, and the profit of factory B was 400 million.

In the second year, factory A made a profit of 100 million, and factory B made a profit of 100 million.

Factory A's profit in the second year is x

Factory B's profit in the second year is 10*(1+12%)-x=x*(1-10%)+

x = the profit of factory A in the second year.

Factory B's profit for the second year is.

Solution: The profits of factories A and B in the second year are x and y respectively

Then x+y=100(1+12%), x(1+10%)+y(1+15%)=100, x=66, y=46