Question

1-Calcule (Obs: Preciso dos cálculos completos

A) 4X-3-X+8=11

B) 6.(x-2) =12

C) 9+2 . (5X-4) = 21

D) 10X+4 . (3-2x)-6 = 8

E) 3 . (5+3X)+5 . (-X-1) = 22

F) 2 . (9X-4) -7+3 . (6-5X) =18

Dou os 20 pontos aos que responderem TODAS e corretas ;)

Answer 1

a) 4x - x = 11 + 3 - 8
3x = 14 - 8
3x = 6
x = 6/3
x = 2

b) 6 * (x - 2) = 12
6x - 12 = 12
6x = 12 + 12
6x = 24
x = 24/6
x = 4

c) 9 + 2 * (5x - 4) = 21
10x - 8 = 21 - 9
10x = 12 + 8
10x = 20
x = 20/10
x = 2

d) 10x + 4 * (3 - 2x) - 6 = 8
10x + 12 - 8x = 8 + 6
2x = 14 - 12
2x = 2
x = 2/2
x = 1

e) 3 * (5 + 3x) + 5 * (- x - 1) = 22
15 + 9x - 5x - 5 = 22
4x = 22 - 15 + 5
4x = 7 + 5
4x = 12
x = 12/4
x = 3

f) 2 * (9x - 4) - 7 + 3 * (6 - 5x) = 18
18x - 8  + 18 - 15x = 18 + 7
3x = 25 + 8 - 18
3x = 33 - 18
3x = 15
x = 15/3
x = 5

espero ter ajudado