Question

Resolver:
a. 2x + 7= -3
b. 5x + -7= x- -9
c. -9+6x= 15 + 2x
d. 5x – 1= 9
e. 4x – 2= 8 + 3x
f. -6 + 2x -5=´5x + 10x – 3
g. 7(x + 8) = -7
h. 6(3x – 2) = 24
i. 2(3x – 7) = 4x - 6
j. 3(8x – 2) = 4 (5x + 6)

Answer 1

Respuesta:

Explicación paso a paso:

resolvemos

a. 2x + 7= -3

2x = -3 - 7

2x = -10

x = -10/2

x = -5

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b. 5x + -7= x- (-9)

un menos delante de un parentesis le cambia el signo al numero que esta adentro del parentesis

5x  - 7= x + 9

5x - x = 9 + 7

4x = 16

x = 16/4

x = 4

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c. -9 + 6x = 15 + 2x

6x - 2x = 15 + 9

4x = 24

x = 24/4

x = 6

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d. 5x – 1= 9

5x = 9 + 1

5x = 10

x = 10/5

x = 2

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e. 4x – 2= 8 + 3x

4x - 3x = 8 + 2

x = 10

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f. -6 + 2x -5=´5x + 10x – 3

-6 - 5 + 3 = 5x + 10x - 2x

-8 = 13x

x = -8/13

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g. 7(x + 8) = -7

7x + 56 = -7

7x = -7 - 56

7x = -63

x = -63/7

x = - 9

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h. 6(3x – 2) = 24

18x - 12 = 24

18x = 24 + 12

18x = 36

x = 36/18

x = 2

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i. 2(3x – 7) = 4x - 6

6x - 14 = 4x - 6

6x - 4x = 14 - 6

2x = 8

x = 8/2

x = 4

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j. 3(8x – 2) = 4 (5x + 6)

24x - 6 = 20x = 24

24x - 20x = 24 + 6

4x = 30

x = 30/4

x = 15/2

x = 7,5