Question

a) 2x + 3 = 15

b) 4x + 2 = - 18

c) 4x - 15 = - 2x + 3

d) 2x - 4 - 8 = 4x

e) 4(x + 1) = 12

f) 5(3 -x) + 4x = 18

g) 8(x - 1) = 8 - 4(x - 3) + 20

h) 13 + 4(2x - 1) = 5(x + 3)

Answer 1

Resposta:

A) 2x + 3 = 15

2x = 15 - 3

2x = 12

X = 12/2

X = 6

B) 4x + 2 = -18

4x = -18 - 2

4x = -20

X = -20/4

X = -5

C) 4x - 15 = -2x + 3

4x + 2x = 3 + 15

6x = 18

X = 18/6

X = 3

D) 2x - 4 - 8 = 4x

2x - 4x = 4 + 8

-2x = 12.(-1)

2x = -12

X = -12/2

X = -6

E) 4(x + 1) = 12

4x + 4 = 12

4x = 12 - 4

4x = 8

X = 8/4

X = 2

F) 5(3 - x) + 4x = 18

15 - 5x + 4x = 18

- 5x + 4x = 18 - 15

- X = 3.(-1)

X = -3

G) 8(x - 1) = 8 - 4(x - 3) + 20

8x - 8 = 8 - 4x - 12 + 20

8x + 4x = 8 - 12 + 20 + 8

12x = 24

X = 24/12

X = 2

H) 13 + 4(2x - 1) = 5(x + 3)

13 + 8x - 4 = 5x + 15

8x - 5x = 15 - 13 + 4

3x = 6

X = 6/3

X = 2

Bjs!