MatemáticasBásico1 respuestas

Encuentren el valor de cada incognita?

Encuentren el valor de cada incognita.

Mejor respuesta

Amysalame
8

2x - 6 = 4x + 2

2x - 4x = 2 + 6 - 2x = 8

x = 8 / - 2

x = - 4

b) 5x - 7 = x + 1

5x - x = 1 + 7

4x = 8

x = 8 / 4

x = 2

c) 4(x - 1) + 3(2x - 5) = 11

4x - 4 + 6x - 15 = 11

10x - 4 - 15 = 11

10x - 19 = 11

10x = 11 + 19

10x = 30

x = 30 / 10

x = 3

d) 2(2 - x) + 3(x + 4) = 5(2x - 4)

4 - 2x + 3x + 12 = 10x - 20

4 + x + 12 = 10x - 20

x + 16 = 10x - 20

x - 10x = - 20 - 16 - 9x = - 36

x = - 36 / - 9

x = 4

e) 2x - 4 / 5 = x + 2 / 2

(2) 2x - 4 = x + 2 / 2(5)

4x - 8 = 5x + 10

4x - 5x = 10 + 8 - x = 18

x = 18 / - 1

x = - 18

f) 4x - 1 / 3 = 2x + 1 / 2

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

8x - 2 = 6x + 3

8x - 6x = 3 + 2

2x = 5

x = 5 / 2

g) 3x / 5 - x / 5 = 8

2x / 5 = 8

2x = 8•5

2x = 30

x = 30 / 2

x = 15.