Question

a)2.(7x+2)+12.(x+1)=2
B)-2.(x-3)=18
h)4.(x-1)-2.(3x+4)=
i)3.(2x-5)=9-2x
j)y+4=-15
l)3x+9=12
m)10-4x=9+2x
n)a-2a+5a=12
o)3.(x-1)=6
p)2.(x+5)= - 4
q)3.(2y-5)=9
r)5.(y-3)=2y+3
s)-8.(x-1)= - 16
t)4.(2x-3)=5.(x+3)
GENTE ME AJUNDEM POR FAVOR

Answer 1

A) 2.(7x+2)+12.(x+1)=2
1
4x + 4 + 12x + 12 = 2

14x + 12x = 2 - 4 - 12

26x = 2 - 16

26x  = - 14

x = - 14/26       simplifica - 14 e 26 por 2

x = - 7/13


S:{- 7/13 }

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B)-2.(x-3)=18

- 2x + 6 = 18

- 2x = 18 - 6

- 2x = 12   .(- 1)

2x = - 12

x = - 12/2

x = - 6


S:{- 6 }

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h) 4.(x-1)-2.(3x+4)= 6

4x - 4 - 6x - 8 = 6

4x - 6x = 6 + 4 + 8

- 2x = 18   .(-1)

2x = - 18

x = - 18/2

x =  - 9

S:{- 9 }

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i) 3.(2x-5)= 9 - 2x

6x - 15 = 9 - 2x

6x + 2x = 9 + 15

8x = 24

x = 24/8

x = 3


S:{ 3 }

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j) y+4= -15

y = - 15 - 4

y = - 19


S:{ - 19 }

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l) 3x+9=12

3x = 12 - 9

3x = 3

x = 3/3

x = 1


S:{ 1 }

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m)10-4x=9+2x

- 4x - 2x = 9 - 10

- 6x = - 1  .(-1)

6x = 1

x = 1/6


S:{ 1/6 }

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n) a - 2a + 5a = 12

a + 5a - 2a = 12

6a - 2a = 12

4a = 12

a = 12/4

a = 3


S:{ 3 }

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o)3.(x-1)=6

3x - 3 = 6

3x = 6 + 3

3x = 9

x = 9/3

x = 3


S:{ 3 }

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p) 2.(x+5)= - 4

2x + 10 = - 4

2x = - 4 - 10

2x = - 14

x = - 14/2

x = - 7


S:{- 7 }

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q) 3.(2y-5)=9

6y - 15 = 9

6y = 9 + 15

6y = 24

y= 24/6

y = 4


S:{ 4 }

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r) 5.(y-3)=2y+3

5y - 15 = 2y + 3

5y - 2y = 3 + 15

3y = 18

y = 18/3

y = 6


 S:{ 6 }

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s) - 8.(x-1)= - 16

- 8x + 8 = - 16

- 8x = - 16 - 8

- 8x = - 24  .(-1)

8x = 24

x = 24/8

x = 3  


S:{ 3 }

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t) 4.(2x - 3) = 5.(x+3)

8x - 12 = 5x + 15

8x - 5x = 15 + 12

3x = 27

x = 27/3

x = 9


S:{ 9 }