Question

Me pueden ayudar con estas ecuaciones,por favor. A_ 2(2×-1)=7(×+1) B_ 2(×+5)-3×=×+18 C_ 3×+5(1+2×)=5×-11 D_ 4(×+7)-6=9(×-2) E_ 3(2×+3)-4(×-5)=1 F_ 7-3(2-×)=10(×-2)

Answer 1

Respuesta:

A) x = -3

B) x = -14

C) x = -2

D) x = 8

E) x = -14

F) x = 6/7 o 0.86

Explicación paso a paso:

A) 2(2x - 1) = 7 (x + 1)

4x - 2 = 7x + 7

4x - 7x = 7 + 2

-3x = 9

x = 9/-3

x = -3

B) 2(x - 5) - 3x = x + 18

2x - 10 - 3x = x + 18

2x - 3x - x = 18 +10

2x - 4x = 28

- 2x = 28

x = 28/-2

x = -14

C) 3× + 5(1 + 2×) = 5× - 11

3x + 5 + 10x = 5x - 11

3x + 10x - 5x = -11 - 5

13 x - 5x = -16

8x = -16

x = -16/8

x = -2

D) 4(× + 7) -6 = 9(× - 2)

4x + 28 - 6 = 9x - 18

4x + 22 = 9x - 18

4x - 9x = -18 - 22

-5x = -40

x = -40/-5

x = 8

E) 3(2× + 3) -4(× - 5) = 1

6x + 9 - 4x + 20 = 1

2x = 1 - 9 - 20

2x = -28

x = -28/2

x = -14

F) 7 - 3(2 - ×) = 10(× - 2)

4(2 - x) = 10x - 20

8 - 4x = 10x - 20

-4x - 10x = -20 + 8

-14x = -12

x = -12/-14

x = 6/7 o 0.86