Question

Matamatyka help... Rozwiązywanie równań ZAD1)-4x + 3 = -x - 6... ZAD2)-2(x - 2) - 7 =-5... ZAD3)-(x + 1) - 2 (1 - x)=-4... ZAD4)-2(1 -x) + 3 (2x+1) = -7... ZAD5)2(13 - x) -9 =1... ZAD6)4(3 - x)+ 9 = 7(2 + x) +29... ZAD7) 2(x + 3) - (5 - x) + 2 =3 -(x4- 1)... ZAD8)3( x-4) - 2(3 - 2x) = -(3x-1) - (1-x)... ZAD9)2x - (x + 4) - 1 = 2 -3(1-x) + 3x... ZAD10)1 - 2 (x - 3) - (3x + 5) = -x-(2x - 1) +3... ZAD11)(x + 2) + (x-3) - (4 - x)= -(2x - 5) - (3 - x) + (2x - 4)... ZAD12)2 (1 - x) + 3 (x+1) - (x - 3) = (2x + 3) - (4-x) - 2(3 - 2x)...

Answer 1

a) -4x + x = -3   -3x = -3/:3   x = 1

b)-2x + 4 - 7 = -5   -2x = -5 + 7 - 4    -2x = -2/:2    x = 1

c)-x - 1 -2 + 2x = -4     -x +2x = -4 + 2 + 1     x = -1

d)-2 + 2x +6x + 3 = -7     8x = -7 -3 + 2     8x = 8/:8    x =1

e)26 - 2x - 9 =1     -2x = 1+9-26    -2x=-16/:(-2)   x=8

f)12-4x+9=14+7x+29     -4x-7x=29+14-9-12    -11x=22/:(-11)    x=-2

g)2x+6-5+x+2=3-x+1     2x+x+x=1+3-2+5-6    4x=1/:4     x=1/4

h)3x-12-6+4x=-3x+1-1+x     3x+4x+3x-x = -1+1+6+12     9x=18/:9    x=2

j)1-2x-6-3x-5=-x-2x+1+3      -2x-3x+x+2x=3+1+5+6-1     -2x=14/(-2)   x=7

 

Muszę iść.

 

Answer 2

a)-4x + 3 = -x - 6

-4x + x = -6 -3

-3x = -9 / : (-3)

x = 3

b)-2(x - 2) - 7 =-5

-2x + 4 -7 = -5

-2x = -5 -5 + 7

-2x = -3 / : (-2)

x =  1,5

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

-x -1 -2 + 2x = -4

-x +2x = -4 +1 +2

x =  -1

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

-2 + 2x +6x +3 =-7

2x + 6x = -7 +2 -3

8x = -8 / :8

x = 1

e)2(13 - x) -9 =1

26 - 2x -9 = 1

-2x = 1-26+9

-2x = -16 / : (-2)

x = 8

f)4(3 - x)+ 9 = 7(2 + x) +29

12 - 4x +9 = 14 + 7x + 29

-4x - 7x = 14 + 29 - 12 - 9

-11x = 22 / : (-11)

x = -2

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

6x +6 -5 + x +2 = 3 -x +1

6x + x +x = 3 + 1 -6 +5 -2

8x = 1 / :8

x = 0,125

h) 3( x-4) - 2(3 - 2x) = -(3x-1) - (1-x)

3x - 12 -6 +4x = -3x + 1 -1 +x

3x + 4x +3x -x = 1-1 + 12 +6

9x =  18 / :9

x = 2

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

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

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

-5x = 4 / :(-5)

x = -0.8

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

1 -2x +6 -3x -5 = -x -2x +1 +3

-2x -3x +x +2x = 1+3 -1 -6 + 5

-2x =  2 / :(-2)

x = -1

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

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

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

4x = 2 / :4

x = 0,5

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

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

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

-3x = -15 / : (-3)

x = 5