Question

a) 8 (x + 2) = 4 (x + 6)
b) 8 (x + 3) = 40
c) 12 x – 14 (1 – x) – 2 (10 x + 4) = 0
d) 10 (2 x – 1) = 4 (x + 4)

Answer 1

Resposta:

a)8x+16=4 ( x+6)

8x+16=4x+24

4x=8

x = 2

b)8(x+3)=40

x+3=5

x=5 -3

x = 2

c)12x- 14(1 - x) - 2(10x + 4)=0

12x -14+ 14x-20x-8=0

6x-22=0

6x=22

x = 11/3

d)10(2x- 1) =4 (x+4)

20x-10=4x+16

20x-4x=16+10

16x=26

x = 13/8