23 Fraction Operations, 23 Equations with an X, 24 Equations with 2 X s Elementary 5th grade

If you had asked me last year, I would. But I'm going to junior high school this year. But I can still :

1 14x+36=148;

2 16x-670=994;

3 18+49-2x=1;

4 70-2x=30;

5 x-(12+6)=190;

8 ;9 x+;

10 x+;

11 4-x=;

14 x+(;

17 7x=;

20 x÷;

2 3x+4x=217;

3 2x-x+ =;

4 5x-6+17x=28;

5 68-5x-13x=50;

6 15x+18x=66;

7 1+5x-2+6x=21;

8 14x+18x+1=385;

9 15+16+15x+16x=310;

10 4x+2x=480;

11 5x+4x-3=24;

12 6x-x=155;

13 5×6x-3x=217;

14 5×3x+16×8x=1287;

15 30x÷6x+5=10;

16 38x÷2=76;

17 25x-13x=240;

18 15x+1-16x=0;

19 19x-2+1-12x=48;

20 28x-15x=39;

21 24-13x+11x=2;

22 25x-12x=130;

23 4+3+2+1-x-2x=4;

24 78x-77x=120.

Yes! The hand is going to be broken!

23.Xiao Wang bought 16 apples, spent 32 yuan, and bought 5 pears. It took yuan to buy a pear and an apple, ask, how much is each pear?

24.Xiao Ming used all the money on his body to buy clothes, if he bought all the tops, he bought 10 pieces, if he bought all the pants, he bought 15 pieces, and he bought a set for 100 yuan. Q: How much money did Xiao Ming have?

It's supposed to be a teacher, right? Lack of professional competence, poured

Question? I'm not doing it ...

I'll only ask questions ...

I can help you figure it out.

What do you mean?

I don't understand it at all.

Summary. x^4+x^3-x^2+x-2=0x^3(x+1)-x(x-1)-2=0

Calculation questions (there are 3 small questions in this big question, each small, 12.)Solve the equation x 4+x 3-x 2+x-2=0

x^4+x^3-x^2+x-2=0x^3(x+1)-x(x-1)-2=0

x 4+x 3-x 2+x=-2 x 3(x+1)-x(x-1)=2 (x+1)Liangchunxian (Sen lead x 3-x)+2x=2 (x+1)(x 2+1)x=0

x 4+x 3-x 2+x=-2 The common factor is given by x 3(x+1)-x(x-1)=2 (x+1)(x 3-x)+2x=2

2x(x-1)(x+1)(x+1)+2(x-1)=0, according to the title, x is not equal to 0

When x is greater than 0, when x=1, 2*0+2*0=0

So x=1 and x is not equal to -1 because the equation does not hold.

The main topic is to extract the common factor,

There are two methods, one is the direct side, there is: 6x-8=226x=22+8

x=30÷6

x=5 When writing, "=" is aligned vertically, and some steps can be saved. Pay attention to the variable signs!!

There is also a no.

3x-4=22÷2

3x=11+4

x=15÷3

After x=5 is calculated, it can be brought into the original design.