Question

me ayudan porfa en esta tarea doy coronita​

Answer 1

Respuesta:

investiga la ley de signos y practica mas de ecuaciones

Explicación paso a paso:

A)  4

B) 1

C) -27/16

D) 24/19

Answer 2

Respuesta:

a) x = -4

b) x = -1

c) x = 2,6875

d) x = 4/19

e) x = 0,333...

f)  x ≈ 1,629

g) x = 15

h) x = 0,4

i) x = 18

j) x = -25

Explicación paso a paso:

a) 5x + 4 = -2x - 24
5x + 4 + 2x = -24
7x + 4 = -24
7x = - 24 - 4
7x = -28
x = -28/7 => x = -4

b) -3x + 2 = - 10x - 5
-3x + 2 + 10x = -5
7x + 2 = -5
7x = - 5 - 2
7x = -7
x = -7/7 => x = -1

c) 2 (3x - 4) = -5 (2x - 7)
6x - 8 = -10x + 35
6x - 8 + 10x = 35
16x - 8 = 35
16x = 35 + 8
16x = 43
x = 43/16 => x = 2,6875

d) - 4 - 3 (5x - 6) = - 4 (- x - 1) + 6
- 4 - 15x + 18 = 4x + 4 + 6
14 - 15x = 4x + 10
14 - 15x - 4x = 10
14 - 19x = 10
-19x = 10 - 14
-19x = -4
x = -4/-19 => x = 4/19

e) -0,4x - 3 = -0,2 + 8x
-0,4x - 3 - 8x = -0,2
-8,4x - 3 = -0,2
-8,4x = -0,2 + 3
-8,4x = 2,8
x = 2,8/-8,4 => x = 0,333...

f) 4x - 0,3 = 0,5x - 6
4x - 0,3 - 0,5x = -6
3,5x - 0,3 = -6
3,5x = -6 + 0,3
3,5x = -5,7
x = -5,7/3,5 => x ≈ 1,629

g) 1/3x - 9 = 1/5x - 7
1/3x - 9 - 1/5x = -7
2/15x - 9 = -7
2/15x = -7 + 9
2/15x = 2
x = $\frac{\frac{2}{1} }{\frac{2}{15} }$
x = 30/2 => x = 15

h) 3/4x - 1 = 2x - 1/2
3/4x - 1 - 2x = -1/2
-5/4x - 1 = -1/2
-5/4x = -1/2 + 1
-5/4x = 1/2
x = $\frac{\frac{1}{2} }{\frac{-5}{4} }$
x = 4/-10 => x = 0,4

i) x - 8 = 10
x = 10 + 8
x = 18

j) 2x + 18 = -32
2x = - 32 - 18
2x = -50
x = -50/2 => x = -25