Question

-3x=2x-10

-(2x-1)=4

3(y+6)-y=2(y+9)

(x-7)-2=7-x

2(x-1)=2

5(x+1)-10=3x+1

2(x+1)-3(x-5)=7x

2x-1=7

5x+6=-2x+4

-3x+4=10

5(2x-3)-6x=3(4x-3)

Answer 1

-3x=2x-10

-3x-2x=-10

-5x=-10 /(-5)

  x = 2

 

-(2x-1)=4

-2x+1=4

-2x=3 /:(-2)

x=-3/2

 

3(y+6)-y=2(y+9)

3y+18-y=2y+18

2y-2y=18-18

0=0  nieskończona liczba rozwiązań

 

(x-7)-2=7-x

x-7-2=7-x

x+x=7+9

2x=16 /:2

x=8

 

2(x-1)=2

2x-2=2

2x=4 /:2

x=2

 

5(x+1)-10=3x+1

5x+5-10=3x+1

5x-3x=1-5+10

2x=6 /:2

x=3

 

2(x+1)-3(x-5)=7x

2x+2-3x+15=7x

2x-3x-7x=-15-2

-8x=-17 /:(-8)

x=17/8

 

2x-1=7

2x=7+1

2x=8 /:2

x=4

 

5x+6=-2x+4

5x+2x=4-6

7x=-2 /:7

x=-2/7

 

-3x+4=10

-3x=10-4

-3x=6 /:(-3)

x=-2

 

5(2x-3)-6x=3(4x-3)

10x-15-6x=12x-9

10x-6x-12x=-9+15

-8x=6 /:(-8)

x=-6/8

x=-3/4

 

Answer 2

-3x=2x-10 => -3x-2x=-10 => -5x=-10 => x=2 

-(2x-1)=4 => -2x+1=4 => -2x=4-1 => -2x=3 => x=-3/2

3(y+6)-y=2(y+9) => 3y+18-y=2y+18 => 2y+18=2y+18 czyli rownanie spełnione przez każde y

(x-7)-2=7-x => x-7-2=7-x => x-9=7-x => x+x=7+9 => 2x=16 => x=8

2(x-1)=2 => 2x-2=2 => 2x=2+2 => 2x=4 => x=2

5(x+1)-10=3x+1 => 5x+5-10=3x+1 => 5x -5 = 3x + 1 => 5x-3x = 1 + 5 => 2x=6 x=3

2(x+1)-3(x-5)=7x => 2x+2-3x+15=7x => -x+17=7x => 17=8x => x=17/8

2x-1=7 => 2x=7+1 => 2x=8 => x=4

5x+6=-2x+4 => 5x+2x=4-6 => 7x=-2 => x=-2/7

-3x+4=10 => -3x=10-4 => -3x=6 => x=-2

5(2x-3)-6x=3(4x-3) => 10x-15-6x=12x-9 => 4x - 12x=-9+15 => -8x=6 => x=-6/8 => x= -3/4