Question

me ajudem com essas contas
2×(7×+2)+12(X+1)=2
-2×(X-3)=18
4×(X-1)-2×(3X+4)=6
3×(2X-5)=9-2X
3×(X-1)=6
2×(2X-5)=9
5×(X-3)=2Y+3
-8×(X-1)=-16
4×(2×-3)=5×(X+3)​

Answer 1

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2.(7×+2)+12(X+1)=2

14x + 4 + 12x + 12 = 2

14x + 12x = - 4 - 12 + 2

26x = -14

x = -14/26 = simplificando por 2 =

x = -7/13

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-2.(X-3)=18

- 2x + 6 = 18

-2x = 18 - 6

-2x = 12

x = 12/-2

x =-6

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4.(X-1)-2.(3X+4)=6

4x - 4 - 6x - 8 = 6

4x - 6x = 6 + 4 + 8

- 2x = 18

x = 18/-2

x = -9

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3.(2X-5)=9-2X

6x - 15 = 9 - 2x

6x + 2x = 9 + 15

8x = 24

x = 24/8

x = 3

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3.(X-1)=6

3x - 3 = 6

3x = 6 + 3

3x = 9

x = 9/3

x = 3

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2.(2X-5)=9

4x - 10 = 9

4x = 9 + 10

4x = 19

x = 19/4

x = 4,75

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5.(X-3)=2Y+3

5x - 15 = 2y + 3

5x - 2y = 3 + 15

3xy = 18

Xy = 18/3

xy = 6

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-8.(X-1)=-16

- 8x + 8 = - 16

-8x = - 16 - 8

-8x = - 24( multiplicando por 1 fica positivo

x = 24/8

x = 3

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4.(2×-3)=5.(X+3)​

8x-12=5x+15  

8x-5x=15+12

3x=27

x=27/3

x=9

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Bons estudos anjo :)