Question

determine o valor de X:
A) 5x+4=x+4.
B) 4.(x+10)=2.(x-5).
C) 3.(2x+3)=4x-1.
D) 5x-2=x-5.
E) 2(3-x)=3(x-4)
F) 11x-16=5x-4​

Answer 1

Resposta:

A) 5x+4=x+4.

5x - x = 4 - 4

4x = 0

x = 0/4 = 0

B) 4.(x+10)=2.(x-5).

4x + 40 = 2x -10

4x - 2x = -10 -40

2x = -50

x= -50/2 = -25

C) 3.(2x+3)=4x-1.

6x + 9 = 4x - 1

6x - 4x = - 1 - 9

2x = -10

x= -10/2= -5

D) 5x-2=x-5.

5x - x = -5 + 2

4x = -3

x= -3/4 = - 0, 75

E) 2(3-x)=3(x-4)

6 - 2x = 3x - 12

-2x - 3x = -6 - 12 (×1)

2x + 3x = 6 + 12

5x = 18

x = 18/5 = 3,6

F) 11x-16=5x-4

11x - 5x = -4 + 16

6x = 12

x= 12/6= 2