MatemáticasBásico2 respuestas

Ecuaciones?

Ecuaciones. A) 3x - 7 = 3x - 35 + 2x b) 5x - 11 - 10x = - x + 5 c) - 12 + 5x = 3x + 6 + 4x d) - 6x - 9 + 5x = 5x - 2x + 11 e) 5(x + 6) - 6x = 10 f) 4(x - 2) = 3(x - 1) g) 2(2 - x) + 6 = 3(x - 2) + 16 h) 7x - 5 = 4x + 4 i) 7x + 2 + 2x = 5x + 6 + 2x j) (x + 12) + 1 = (x - 5) + (x - 3).

Mejor respuesta

Raquel2003
7

Bueno

Te ayudo con las 4 primeras para que te guies

a) 3x - 7 = 3x - 35 + 2x

3x - 7 = 5x - 35

3x - 5x = - 35 - 7

3x - 5x = - 42 - 2x = - 42

x = - 42 / - 2

x = 21

b) 5x - 11 - 10x = - x + 5 - 5x - 11 = - x + 5 - 5x + x = 5 + 11 - 4x = 16

x = 16 / - 4

x = - 4

c) - 12 + 5x = 3x + 6 + 4x - 12 + 5x = 7x + 6

5x - 7x = 6 + 12 - 2x = 18

x = 18 / - 2

x = - 9

d) - 6x - 9 + 5x = 5x - 2x + 11 - x - 9 = 3x + 11 - x - 3x = 11 + 9 - 4x = 20

x = 20 / - 4

x = - 5

Espero ayude.

Otras 1 respuestas

Respuesta 2

Romi2209
2

E) 5(x + 6) - 6x = 10

5(x + 6) - 6x = 10

5x + 30 - 6x = 10

5x - 6x = 10 - 30 - x = - 20

x = 20

.

F) 4(x - 2) = 3(x - 1)

4(x - 2) = 3(x - 1)

4x - 8 = 3x - 3

4x - 3x = - 3 + 8

x = 5

.

G) 2(2 - x) + 6 = 3(x - 2) + 16

2(2 - x) + 6 = 3(x - 2) + 16

4 - 2x + 6 = 3x - 6 + 16 - 2x + 4 + 6 = 3x + 10 - 2x + 10 = 3x + 10 - 2x - 3x = 10 - 10 - 5x = 0

x = 0

.

H) 7x - 5 = 4x + 4

7x - 5 = 4x + 4

7x - 4x = 4 + 5

3x = 9

x = 9 / 3

x = 3

.

I) 7x + 2 + 2x = 5x + 6 + 2x

7x + 2 + 2x = 5x + 6 + 2x

7x + 2x + 2 = 5x + 2x + 6

9x + 2 = 7x + 6

9x - 7x = 6 - 2

2x = 4

x = 4 / 2

x = 2

.

J) (x + 12) + 1 = (x - 5) + (x - 3)

(x + 12) + 1 = (x - 5) + (x - 3)

x + 12 + 1 = x - 5 + x - 3

x + 13 = x + x - 5 - 2

x + 13 = 2x - 8

x - 2x = - 8 - 13 - x = - 21

x = 21.