Question

ayuda es para hoy xd doy coronita :)

Answer 1

Respuesta:

a)3x+1=x-1

R= X=-1

b) 5(2x+3)=5x+8

R= X=-7/5

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

R= X=-18/5

Answer 2

Respuesta:

a) 3x + 1 = x - 1

3x - x = -2

2x = -2

x = -2/2

x = -1

3(-1) + 1 = (-1) - 1

-3 + 1 = -2

-2 = -2

b) 5(2x + 3) = 5x + 8

10x + 15 = 5x + 8

15 - 8 = 5x - 10x

7 = -5x

-7/5 = x

5 (2 (-7/5) +3) = 5 (-7/5) +8

5 ( -14/5 + 3) = -7 + 8

5 (1/5) = 1

1 = 1

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

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

(-5/4)x = 9/2

x = (9/2) / (-5/4)

x = -18/5

(3/4)(-18/5) - 4 = 2(-18/5) + 1/2

-27/10 - 4 = -36/5 + 1/2

-67/10 = -67/10