Question

A) 2X + 8 = 4

B) 10X = 5

C) 20X = 2

D) X + 3X = 12

E) 9X + 3 + 3 + 2 = 12

F) 5X = 10

G) 6X = 3

H) 3 (x + 2) = 6

1) 4 (X + 3) = 4

J) X + X + X + X + X = 20​

Answer 1

Resposta:

a) 2x + 8 = 4

2x + 8 - 8 = 0

2x = 4 - 8

2x = 4

x = - 4:2

x = - 2

b) 10x = 5

10x/10 = 5/10

x = 1/2

c) 20x = 2

20x/20 = 2/20

x = 1/20

d) x + 3x = 12

4x = 12

x = 12:4

x = 3

e) 9x + 3 + 3 + 2 = 12

9x + 8 = 12

9x + 8 - 8 = 0

9x = 12 - 8

9x = 4

x = 4:9

x = 4/9

f) 5x = 10

5x/5 = 10/5

x = 2

g) 6x = 3

6x/6 = 3/6

x = 1/2

h) 3(x + 2) = 6

3(x+2)/3 = 6/3

x + 2 = 2

x + 2 - 2 = 0

x = 2 - 2

x = 0

i) 4(x + 3) = 4

4(x+3)/4 = 4/4

x + 3 = 1

x + 3 - 3 = 0

x = 1 - 3

x = - 2

j) x + x + x + x + x = 20

5x = 20

x = 20:5

x = 4