X+25%x= 1560.

y- 10%y= 1350

The solution is x= 1248.

y= 1500

.

Therefore, the profit (1560+1350)-(1248+1500) =162 (yuan).

A: Profit. The clothing store made a profit this day 162 yuan.

2. Solution: Let's assume that it took Xiao Ming's father x minutes to catch up with Xiao Ming, so Xiao Ming walked for (x+5) minutes.

From the meaning of the question: 80(x+5)= 180x,

Solution: x=4 (minutes),

∫80×9 < 1000m，

A: Yes, it takes 4 minutes to catch up.

3.y seconds later, Xiao Gang caught up with Xiao Ming. According to the meaning of the question, Xiao Bin runs 6 meters and Xiaoming runs 4 meters.

The equation is: 6y-4y= 10,

The solution is y = 5；;

A: They started in the same direction at the same time. Five seconds later, Xiao Bin caught up with Xiao Ming.

4, set to do the X question:

4*x - 1*(25-x)=90

4*x+x = 90 +25

5x = 1 15

x = 23

Then if a student gets 90 points, then he has done 23 questions correctly;

The second question:

Similarly:

Suppose a classmate scored 83 points, then the classmate did the right X:

4*x - 1*(25-x) = 83

5x = 83+25

5x = 108

x = 2 1.6

5、

Let the flat field x be (1 1-x)*2/3. It is known that 2 * (11-x) * 2/3+x =14. The solution is that x is 26, and the solution is that there are x people.

x-( 1/2)x-( 1/4)x-( 1/7)x & lt； six

Get x

Then x=28.