Question

resuelve y verifique las ecuaciones.

A) 2x+13=-15

B)7x+8=64

C)20=3X-5.(-4)

D)x+3x+5=-3.5

E)3.4-5.6=2x+7x

F)x+3-7x=-40+7

G)9-3x+2x=4x+39


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Answer 1

Respuesta y explicación:

A) 2x+13=-15

→ 2x = -15 -13

→ 2x = -28

→ x = -14

B) 7x+8=64

→ 7x = 56

→ x = 8

C) 20=3X-5.(-4)

→ 20 = 3x - (-20)

→ 20 = 3x + 20

→ 20 - 20 = 3x

→ 0 = 3x

→ x = 0

D) x+3x+5=-3.5

→ 4x + 5 = - 15

→ 4x = -15 -5

→ 4x = -20

→ x = -5

E) 3.4-5.6=2x+7x

→ 12 - 30 = 9x

→ - 18 = 9x

→ x = -2

F) x+3-7x=-40+7

→ 3 - 6x = - 33

→ - 6x = -33 -3

→ - 6x = - 36

→ x = 6

G) 9-3x+2x=4x+39

→ 9 - x = 4x +39

→ 9 - 39 = 4x + x

→ - 30 = 5x

→ x = -6