Question

Ayúdenme con el punto 3, rápido

Answer 1

a. 2x = 12

x = 12/ 2

x = 6.

b. x + 1 = 0

x = 0 - 1

x = -1

c. 2x - 3 = 5

2x = 5 + 3

2x = 8

x = 8/2

x = 4

d. -8x = 1

8x = 1

x = 1/8

e. 4 - x = 2.

4 - x - 4 = 2 - 4

-x = -2

x = 2

f. 5 - 4x = 10

5 - 4x - 5 = 10 - 5

-4x = 5

4x = -5

x = -5/4

g. -x = 7

x = -7

h. 1 - 2x = -3

1 - 2x - 1 = -3 - 1

-2x = -4

2x = 4

x = 4/2

x = 2.

j. x + 1/x = 4

x+1/x (x) = 4x

x + 1 = 4x

x + 1 - 1 = 4x - 1

x = 4x - 1

x - 4x = 4x - 1 - 4x

-3x = -1

3x = 1

x = 1/3

k. 5-x/1-x = 10

5-x/1-x (1 - x) = 10(1 - x)

5 - x = 10(1 - x)

5 - x = 10 - 10x

5 - x - 5 = 10 - 10x - 5

-x = -10x + 5

-x + 10x = -10x + 5 + 10x

9x = 5

x = 5/9

l. x/1+3x = 2

x/1+3x (1 + 3x) = 2(1 + 3x)

x = 2(1 + 3x)

x = 2 + 6x

x - 6x = 2 + 6x - 6x

-5x = 2

5x = -2

x = -2/5

m. 5x + 3 = 4x - 3

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

5x = 4x - 6

5x - 4x = 4x - 6 - 4x

x = -6

n. 8x - 5 = 2 - x

8x = -x + 7

8x + x = -x + 7 + x

9x = 7

x = 7/9

o. 3x - 1 = 4 - 2x

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

3x = -2x + 5

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

5x = 5

x = 5/5

x = 1

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