Question

równania

2x-1/2>4x+1/3

x-3/2-2<2x+1/5

3x/3-x>x/2+3

zad 3

11x-25+13x+10x<9x+120

-13x+5x+80-14x>3x-87-5x

-4x-12-10x-70≤x=49+2x+102+x+55

5x-4+6x-12≥2x-8+17-32

zad 4

5x-3>3(x-1)+4

5-2x<2-5(x+3)

4(2x+5)+ ≥3x-3

-8-2(x-7)≤3(x+2)

zad 5

(3x+2)^+(4x-1)^<(2x+5)^+x(21x+7)+3

(10x+1)^-(6x+2)^>(8x-1)^

(5x-3)^≤(5x+2)(5x-2)-17

tam naprzykład jak jest1/2 to jest naprzykład 2x-1 to po tym jest 2

Answer 1

równania:

2x - 1/2 = 4x + 1/3

2x - 4x = 1/3 +1/2

-2x = 2/6 + 3/6

-2x = 5/6 /-2

x = - 5/12

 

x - 3/2 - 2 = 2x + 1/5

x - 2x = 1/5 + 3/2 + 2

-x = 2/10 + 15/10 + 2

-x = 17/10 + 2

-x = 17/10 + 2/1

-x = 17/10 + 20/10

-x = 37/10 /:(-1)

x = - 37/10

x= - 3,7

 

3x/3 - x = x/2 +3 /*6

6x - 6x = 3x + 18

6x - 6x - 3x = 18

-3x = 18 /:(-3)

x= -6

 

zad.3

11x - 25 +13x +10x = 9x + 120

11x +13x +10x - 9x = 120 + 25

25x = 145 /:25

x= 5,8

 

-13x + 5x + 80 -14x = 3x - 87 - 5x

-13x +5x -14x - 3x +5x = -87-80

-20x = -167 /:(-20)

x= 8,35

 

-4x-12-10x-70x=49+2x+102+x+55

-4x-10x-70x-2x-x=49+102+55+12

-87x=218 /(-87)

x=-2 44/87

 

5x-4+6x-12=2x-8+17-32

5x+6x-2x=-8+17-32+4+12

9x=-7 /:9

x=-7/9

 

zad.4

5x-3=3(x-1)+4

5x-3=3x-3+4

5x-3x=-3+4+3

2x=4 /:2

x=2

 

5-2x=2-5(x+3)

5-2x=2-5x-15

-2x+5x=2-15-5

3x=-18 /:3

x=6

 

4(2x+5)=3x-3

8x+20=3x-3

8x-3x=-3-20

5x=-23 /:5

x=-4,6

 

-8-2(x-7)=3(x+2)

-8-2x+14=3x+6

-2x-3x=6+8-14

-5x=0 /(-5)

x=0