Question

Resolva as equações do primeiro grau:
A)4 x -15 = -2 x +3
B)2 x - 4 - 8 = 4 x
C)3 x = x + 1 + 7
D)2 x + 5 -5 x = -1
E)5 + 6 x = 5 x +2
F)x + 2 x -1 -3= x
G)5 x -5 + x = 9+ x
H)7 x -4 - x = -2 x +8 -3 x
I)- x -5 +4 x = -7 +6 x +15
J)3 x -2 x = 3x
K) 2 -4 x 32 -18 x +12
L)2 x -1= -3 + x +4
M)3x -2 -2 x -3 =0
N)10 -9 x +2 x= 2-3 x
O)4x -4 -5 x= -6 +90
P)2 -3 x = -2 x +12 -3x

Por favor me ajudem, tenho até amanhã!

Answer 1

A)

4x-15 = -2x+3

4x+2x = 3+15

6x = 18

 x = 18/6

 x= 3

Resposta → S= {3}

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B)

2x-4-8 = 4x

4x-2x = -12

2x = -12

 x = -12/2

 x= -6

Resposta → S= {-6}

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C)

3x = x+1+7

3x-x = 8

2x = 8

 x= 8/2

 x= 4

Resposta → S= {4}

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D)

2x+5-5x = -1

-3x = -1-5

-3x = -6

  x = -6/-3

  x= 2

Resposta → S= {2}

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E)

5+6x = 5x+2

6x-5x = 2-5

x = -3

Resposta → S= {-3}

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F)

x+2x-1-3 = x

3x-4 = x

3x-x = 4

4x = 4

 x = 4/4

  x= 1

Resposta → S= {1}

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G)

5x-5+x = 9+x

6x-5 = 9+x

6x-x = 9+5

5x = 14

x = 14/5

Resposta → S= {14/5}

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H)

7x-4-x = -2x+8-3x

6x+2x+3x = 8+4

11x = 12

  x= 12/11

Resposta → S= {12/11}

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I)

- x-5+4x = -7+6x+15

3x-6x = -7+15+5

-3x = 8+5

-3x = 13

  x= -13/3

Resposta → S= {-13/3}

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J)

3x-2x = 3x

x = 3x

3x-x= 0

2x = 0

 x= 0/2

 x= 0

Resposta → S= {0}

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K)

2 -4 x 32-18x+12

Cadê o sinal do 32?

===============================================================

L)

2x-1 = -3+x+4

2x-x = -3+4+1

x = 2

Resposta → S= {2}

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M)

3x-2-2x-3 = 0

x-5 = 0

x = 5

Resposta → S= {5}

===============================================================

N)

10-9x+2x = 2-3x

10-7x = 2-3x

-7x+3x = 2-10

-4x = -8

  x= -8/-4

  x= 2

Resposta → S= {2}

================================================================

O)

4x-4-5x= -6+90

-x = 84+4

-x= 88  *(-1)

x= -88

Resposta → S= {88}

===============================================================

P)

2-3 x = -2x+12-3x

-3x+2x+3x = 12-2

2x = 10

 x= 10/2

 x= 5

Resposta → S= {5}

Answer 2

a) 4x-15=-2x+3

   4x+2x=3+15

   6x=18

    x=3

b) 2 x - 4 - 8 = 4 x

    2x-4x=+4+8

   -2x=12  (-1)

   2x=-12

   x=6

c)3 x = x + 1 + 7

  3x-x=8

  2x=8

  x=4

d)2 x + 5 -5 x = -1

 2x-5x= -1 -6

 -3x= -7 (-1)

  3x=7

 x=7/3

e)5 + 6 x = 5 x +2

    6x-5x=2-5

   X=-3

f)x + 2 x -1 -3= x

x + 2 x -1 -3= x  

-2x+2x=+1+3

X=4

g)5 x -5 + x = 9+ x

5x+x-x=9+5

5x=14

X=14/5

h)7 x -4 - x = -2 x +8 -3 x

7x-x+5x=8+4

6x+5x=12

11x=12

X=12/11

I)- x -5 +4 x = -7 +6 x +15

3x-6x= -7+15+5

-3x=20-7

-3x=13 (-1)

X=13/3

J)3 x -2 x = 3x

  X-3x=0

 -2x (-1)

 2x

k)não tem como resolver (=)

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

 2x-x= -3+4+1

 X=2

M)3x -2 -2 x -3 =0

  X=+2+3

 X=5

N)10 -9 x +2 x= 2-3 x

-7x+3x=2-10

-4x=8 (-1)

4x=-8

X= -2

O)4x -4 -5 x= -6 +90

    -x=+4-6+90

    -x= -2+90

    -x=88 (-1)

    X= -88

P)2 -3 x = -2 x +12 -3x

   -3x+2x+3x=+12-2

   2x=10

   X=5