Question

Alguien me ayuda en esta ecuacion??

1) 5(x + 2) = 40
2) 3(x - 4) + 6 = 9
3) 2x(4x - 3) = 8x2 - 18
4) -2(x + 3) + 5(x - 2) = x + 1
5) 4(x + 3) - 2(-x + 3) = 6 - x
6) 8(x + 2) = 3(x - 5) - 7(x + 3)
7) a(x + 1) + 5a(x - 1) = 2(3b - 2a)
8) x(a + 1) - x(a - 1) = 2a + 4

Answer 1

Respuesta:

Explicación paso a paso:

1) 5(x + 2) = 40

5x + 10 = 40

5x  = 40 - 10

5x = 30

x = 30/6

x = 5

2) 3(x - 4) + 6 = 9

3x - 12 + 6 = 9

3x = 9 + 12 - 6

3x = 15

x = 15/3

x = 5

3) 2x(4x - 3) = 8x2 - 18

8x^2 - 6x = 8x^2 - 18

-6x = -18

6x = 18

x = 18/3

x=6

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

-2x - 6 + 5x - 10 = x + 1

-2x + 5x - x = 1 + 6 + 10

2x = 17

x = 17/2

5) 4(x + 3) - 2(-x + 3) = 6 - x

4x + 12 + 2x - 6 = 6 - x

4x + 2x + x = 6 + 6 - 12

7x = 0

x = 0

6) 8(x + 2) = 3(x - 5) - 7(x + 3)

8x + 16 = 3x - 15 - 7x - 21

8x - 3x + 7x = -15 -21 -16

12x = -52

x = -52/12

x = -13/3

7) a(x + 1) + 5a(x - 1) = 2(3b - 2a)

ax + a + 5ax - 5a = 6b - 4a

ax + 5ax = 6b - 4a - a + 5a

6ax = 6b -5a +5a

6ax = 6b

ax = b

x = b/a

8) x(a + 1) - x(a - 1) = 2a + 4

ax + x - ax + x = 2a + 4

2x = 2a + 4

x = a + 2

LIKE, 5 ESTRELLAS Y CORONITA XD.