Question

Hola me ayudan porfavor con la siguiente tarea de matematicas!
Muchas gracias!

Answer 1

Ejercicio a

2/5 + 3.25x = (3x+5)/2

4/5+6.50x = 3x+5

-3x +6.50x = 5 - 4/5

3.5x = 4.2

x = 1.2

Ejercicio b

0.75(1.1 + 2/9x) =4/5 + x

3/4(10/9 + 2/9x) = 4/5 + x

5/6 + 1/6x = 4/5 + x

1/30 = 5x/6

6/30 = 5x

x = 1/25

Ejercicio c

5/6 + 0.6x = (3+x)/2 - 3/4

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

19/12 + 2/3x = (3+x)/2

38/12 + 4/3x = 3+x

1/6 = -x/3

x = -1/2

Ejercicio d

0.4 + (1-x)/2 = -0.25x - (3-2x)/4

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

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

16/5 +4 - 4x = -2x -6 + 4x

66/5 = 6x

x = 11/5

Ejercicio e

(4x-9) /10 +5/4 = (2-x)/5 (3.75)

(4x-9) /10 +5/4 = 15(2-x)/20

(4)(20)(4x-9) + 20(50) = 600(2-x)

320x -720 + 1000 = 1200 - 600x

920x = 920

x = 920/920

x = 1

Ejercicio f

1/2x - (7x-14)/10 - 5/2 = (3-2x)/5

5x - 7x + 14 - 25 = 2(3-2x)

-2x -11 = 6 - 4x

2x = 17

x = 17/2

Plantea y responde

a) x - 2/9x -3/5x = 288

9x -2x - 27x/5 = 2592

35x - 27x = 12960

x = 12960/8

x = 1620

Tenia = $ 1620

b) 4/7x +5/8(3/7x) +90 = x

   4-/7x -15x/56 + x = 90

   9x/56 = 90

  9x = 5040

x = 5040/9

x = 560

La longitud del trayecto es de 560 km