Question

Rozwiąż równania:

-3x = 2x- 10

2x - 2 = 7 - x

10 = 4- 2x

-(2x - 1) = 4

2(x + 1) = x

2t - (3t + 1) = 6
-(4 + x) = 2(3 -x)

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

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

Answer 1

-3x = 2x- 10

-3x-2x=-10

-5x=-10:(-5)

   x=2

 

2x - 2 = 7 - x

2x+x=7+2

3x=9:3

  x=3

 

10 = 4- 2x

2x=4-10

2x=6:2

  x=3

 

-(2x - 1) = 4

2x+1=4

2x=4-1

2x=3:2

  x=3/2=1i1/2

 

2(x + 1) = x

2x+2=x

2x-x=-2

x=-2

 

2t - (3t + 1) = 6

2t-3t-1=6

2t-3t=6+1

  t=7

 

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

-4-x=6-2x

-x+2x=6+4

  x=10

 

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

3y+18-y=2y+18

3y-y-2y=18-18

0=0

 

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

x-2-6x-10=5

x-6x=5+10+2

5x=17:5

  x=17/5=3i2/5

 

Mam nadzieję że pomogłam:)

Answer 2

-3x=2x-10
-3x-2x= -10
-5x= -10 /:-5
   x=2

 

2x-2=7-x
2x+x=7+2
3x=9   /:3
x=3

 

10=4-2x
2x=4-10
2x= -6   /:2
x= -3

 

 

-[2x-1]=4
-2x+1=4
-2x=4-1
-2x=3   /:-2
x=  -3/2
x= -1 1/2

 

2[x+1]=x
2x+2=x
2x-x= -2
x= -2

 

2t-[3t+1]=6
2t-3t-1=6
2t-3t=6+1
-1t=7    /*-1
t= -7

 

 

-[4+x]=2[3-x]
-4-x=6-2x
-x+2x=6+4
x=10

 

3[y+6]-y=2[y+9]
3y+18-y=2y+18
3y-y-2y=18-18
0=0

 

 

[x-7]-2[3x+5]=5
x-7-6x-10=5
x-6x=5+7+10
-5x=23 /:-5
 x= -23/5
 x= -4 3/5