It s four math how tos, four math problems

How can it not be at all, has math not been good since elementary school? Are you a liberal arts or science student?

I think there's a reason for everything.

Since you have chosen to repeat the study, you have to settle down. I have already experienced a year of senior year, and it is useless to be impetuous.

It's good to be aware of your shortcomings, don't worry too much, and use the time you're worried about to do something useful.

Mathematics has always been my favorite since elementary school, and I can't tell why I have such a soft spot for mathematics, maybe because I like to challenge difficult problems, or because I am happy after solving them.

But the only thing that has changed is that in the past, mathematics was my strong point, and I could get a lot of points in one subject. But not now, maybe it's because the more you learn the knowledge points, the more difficult it becomes, or maybe the people around you are getting better and better.

No matter what you study, I think interest is the best teacher, mathematics is no exception, when you like mathematics very much, it is like a big piece of sweet cake in front of you, what you have to do is not to swallow it in one bite as fast as possible, but to taste it slowly in a small bite, to eat every little knowledge point thoroughly, understand thoroughly, don't worry, little by little. You have to take the trouble to practice the questions, ask others questions that you don't know about, and read books and ...... repeatedly

In fact, there are many ways to learn, and the one that suits you is the best.

Hehe, I'm in my third year of high school this year, and for all the children who take the college entrance examination next year, every minute from now to before the college entrance examination is crucial. Come on, I hope I can live up to the time of my senior year of high school.

Solution: (1) If there are x white balls, then there are 3x red balls.

3x-5×(x/3)=44

x=33，3x=99

A: There are 33 white balls and 99 red balls.

2) If I am x years old, then there is.

x+23+3)+(x+23)+x+(x-4)=81x=9 so dad is 9 + 23 + 3 = 35 years old, mom is 9 + 23 = 32 years old, I am 9 years old, and my brother is 9-4 = 5 years old.

3) If there are x people in the great monk, there will be.

100-x)÷3+3x=100

x=25 so there are 25 great monks and 100-25=75 small monks.

4) If there are x students in class B, there will be.

x+4）+x+（x-1）=108

x=35，x+4=39,x-1=34

Therefore, the students in classes A, B, and C are respectively ).

1.The number of times the white ball x is obtained is n: x-3n=0; 3x-5n=44 n=11 x=33 There are 33 white balls and 99 red balls.

2. x+(x+4)+(x+4+23)+(x+4+23+3)=81 x=5 5,9,32,35

3. x+y=100 3x+y/3=100 x=25 y=754.108= x+(x+1)+(x+1+4) x is the number of people in class B x=34 39,35,34

Upstairs, isn't it the same as taking the equation straight in? Why are there so many?

1.33 for white balls, 99 for red balls

2.I'm 9 years old, my brother is 5 years old, my dad is 35 years old, and my mom is 32 years old.

3.There are 25 big monks and 75 small monks.

4.A 39, B 35, C 34

The number of students in Class A, B and C is X, Y, and Z

Rule. x+y+z=108

x=y+4y=z+1

The three equations are combined, and the solution is: x=39y=35 .z=34

Apples, 3/4 of apples = plums, total length of highways, repaired, total length, 4/25, 40

1,920 chickens and 2,400 ducks.

The equation for the center of the circle x 2+y 2=5 (0,0)op is: y=-2x, and its inscribed center is on the extension line of op, and the center of the circle is the m point, |om|= 5+2 5=3 5,x 2+(-2x) 2=(3 5) 2,x=-3,y=6, the inscribed circle equation is: (x+3) 2+(y-6) 2=20

Equation? 1. Assuming that the width is x, the length is 2x

2 (x+2x) = 144 x = 24 length 48

2. Xiao Hong is x, and Xiao Ming is 3x

3x-40=x+40

x=40 Xiao Ming 120

3. Father is x years old. The son is 70-x

x+7=2*(70-x+7)

Get x=49 son 21

6=24 so width 24 length 48

2. Send 40 the same, so the difference is 40 2 = 80 80 (3-1) = 40 So: red 40 Ming 120

3. Send someone 40 the same, so the difference is 40 40 (3-1)=20 So: red 20 Ming 60

After the year, the total increase was 7 2 = 14 years (70 + 14) (2 + 1) = 28 28 2-7 = 49 years.

1、△abc≌△acd

afb≌ced

ade≌△cbf

2. AB CD (known).

BAF = DCE (two straight lines are parallel, the inner wrong angles are equal) 1 = 2 (known).

ab=cd (known).

BAF = DCE (verified).

afb≌△ced(asa)

Because 1= 4;And because 1= 2;

So 4= 2;

So EC parallel bf;

So b= 3;

And because b= c;

So 3= c;

So ab parallel cd;

So a= d