Question

Resolver y verificar las siguientes ecuaciones:

A) 3x+5 = - 4x - 16

B) 5x +8 = 7x - 32

C) 9x - 1 = 107 - 3x

D) 7 (2x - 1) = 5 (2x +1)

:''(

Answer 1

Respuesta:

A_. 3x + 5 = -4x -16

3x +4x = -16 -5

7x = -21

x = -21 : 7

x = -3

B_ 5x+8= 7x-32

5x-7x= -32-8

-2x = - 40

x = - 40 : -2

x = 20

c_ 9x-1=107 -3x

9x + 3x = 107 + 1

12x = 108

x = 108 : 12

x = 9

D_ 7(2x- 1)= 5(2x+ 1)

14x - 7 = 10x + 5

14x-10x = +5 +7

4x = 12

x = 12 : 4

x = 3