Question

Resolva as equações:

a) 2x+8-x = -x+18+4-6

b) 2x+18-6-x=4x+21+3

c) 6x-3+6-28=4x+18+7

d) 2x+4x+2-8x= -9x+6-9+8

e) 6x-3x+6-28+4x+18+7=9x+6-9+8

f) 8x-8x+16x-24x-8=4x-10x+18

g) 3x-3x-9x-2=8x--20x-18-10

h) 4x+12-16+18=4x+36+7

i) 2x+4-8x= -6x+9-18+24

me ajudem por favor!!!!

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Answer 1

Resposta:

a) X = 4

b) X = - 4

c) X = 25

d) X = 3/7

e) X = - 1

f) X = - 13

g) X = - 26/3

h) 33 (?)

i) 11 (?)

Explicação passo-a-passo:

A) 2x + 8 - x = - x + 18 + 4 - 6

2x - x + x = 18 + 4 - 6 - 8

2x = 22 - 14

2x = 8

x = 8:2

x = 4

B) 2x + 18 - 6 - x = 4x + 21 + 3

2x + 12 - x = 4x + 24

2x - x - 4x = 24 - 12

- 3x = 12

x = 12 : - 3

x = - 4

C) 6x - 3 + 6 - 28 = 4x + 18 + 7

6x - 4x = 18 + 7 + 3 - 6 + 28

2x = 50

x = 50:2

x = 25

D) 2x + 4x + 2 - 8x = -9x + 6 - 9 + 8

6x - 8x + 9x = 6 - 9 + 8 - 2

7x = 3

x = 3/7

E) 6x - 3x + 6 - 28 + 4x + 18 + 7 = 9x + 6 - 9 + 8

3x + 4x - 9x = 6 - 9 + 8 - 6 + 28 - 18 - 7

- 2x = 2

x = 2: -2

x = - 1

F) 8x - 8x + 16x - 24x - 8 = 4x - 10x + 18

8x - 8x + 16x - 24x - 4x + 10x = 18 + 8

- 2x = 26

x = 26: -2

x = - 13

G) 3x - 3x - 9x - 2 = 8x - 20x - 18 - 10

3x - 3x - 9x - 8x + 20x = - 18 - 10 + 2

3x = - 26

x = - 26/3

H) 4x + 12 - 16 + 18 = 4x + 36 + 7

4x - 4x = 36 + 7 - 12 - 16 + 18

0 = 33

I) 2x + 4 - 8x = -6x + 9 - 18 + 24

2x - 8x + 6x = 9 - 18 + 24 - 4

0 = 11