Question

a) 2x + 6 = x + 18 b) 12x – 2 = 9x + 16 c) 5x + 9 = 34 d) 3(x + 3) = 2(x + 10) e) 3x-10+13=-2x+28 f) 20x - 4 = 5x g) 4(x - 3) = 2x – 5

Answer 1

a) 2x + 6 = x + 18

2x-x=18-6

1x=12

x=12

b) 12x – 2 = 9x + 16

12x-9x=16+2

3x=18

x=18/3

x=6

c) 5x + 9 = 34

5x=25

x=25/5

x=5

d) 3(x + 3) = 2(x + 10)

3x+9=2x+20

3x-2x=20-9

1x=11

x=11

e) 3x-10+13=-2x+28

3x+2x=28+10-13

5x=25

x=25/5

x=5

f) 20x - 4 = 5x

20x-5x=4

15x=4

x=4/15

g) 4(x - 3) = 2x – 5

4x-12=2x-5

4x-2x=-5+12

2x=7

x=7/2

Answer 2

Resposta:

a) 2x + 6 = x + 18

2x-x=18-6

1x=12

x=12

b) 12x – 2 = 9x + 16

12x-9x=16+2

3x=18

x=18/3

x=6

c) 5x + 9 = 34

5x=25

x=25/5

x=5

d) 3(x + 3) = 2(x + 10)

3x+9=2x+20

3x-2x=20-9

1x=11

x=11

e) 3x-10+13=-2x+28

3x+2x=28+10-13

5x=25

x=25/5

x=5

f) 20x - 4 = 5x

20x-5x=4

15x=4

x=4/15

g) 4(x - 3) = 2x – 5

4x-12=2x-5

4x-2x=-5+12

2x=7

x=7/2

marca a melhor to p´recisando ambicioso n é bom

Explicação passo-a-passo: