Question

Rozwiąż równanie: 1. -3(2x+1)=-(x-4)

2. 8x-(1+2x)=2(3x-0,5)

3. x-2(x-1)=0,2(1-2x)

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

5. x-5[2x-3(x+6)]=-4(x-5)

6. 1 3/4=2(x+2)+3(x+ 1/4)

7. 2x+3//5=2-x//3 -x

8. 5(x-1)//3 - 3(2x-3)//2=2 1/2 -x

to: 3/4 - trzy czwarte 1/2 - jedna druga

a to: // - przez

Answer 1

1. -3(2x+1)=-(x-4)

-6x-3=-(x-4)

-6x+x=4+3

-5x=7|\\-5

x=1,4

2. 8x-(1+2x)=2(3x-0,5)

-8x+16x=6x-1

8x-6x=-1

2x=-1

x=-1/2

3. x-2(x-1)=0,2(1-2x)

x-2x+2=0,2-0,4x

-x+2=0,2-0,4x

0,6x=-1,8

x=3

4.2(5x-4)-5(x-3)=x-2(4-2x)

10x+8-5x-+15=x-8-4x

5x+23=-3x-8

8x=15

x=1,9

5.x-5[2x-3(x+6)]=-4(x-5)

x-5(2x-3x+18)=-4(x-5)

x-10x-15x+18=-4x+20

-20x=2

20x=-2

x=-0,1

6,1 3/4=2(x+2)+3(x+ 1/4)

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

1,75=5x+4,75

-5x=3

5x=-3

x=1,7

7.2x+3//5=2-x//3 -x|*15

15*2x+3//5=15*2-x//3-x

6x+9=10-x//5x

6x=-7

x=1,2

 

8.5(x-1)//3 - 3(2x-3)//2=2 1/2 -x

5x-5//3-6x+6//2=2,5-x |*6

6*5x-5//3-6*6x+6//2=15-6x

10x-10-18x+6=15-6x

-2x=19

2x=-19

x=9,5