Question

Ajuda pfv tenho só até amanhã pra entregar

Answer 1

Explicação passo-a-passo:

a) 7x + 1 = 5x + 9

7x - 5x = 9 - 1

2x = 8

x = 8/2

x = 4

b) y + 5 = -9y - 15

1y + 9y = -15 - 5

10y = -20

y = -20/10

y = -2

c) 17x - 1 = 15x + 3

17x - 15x = 3 + 1

2x = 4

x = 4/2

x = 2

c) -x + 16 = x + 25

-1x - 1x = 25 - 16

-2x = 9

x = 9/-2

x = -9/2

d) 20x - 13 = 9x + 20

20x - 9x = 20 + 13

11x = 33

x = 33/11

x = 3

e) 21x + 1 = 11x + 6

21x - 11x = 6 - 1

10x = 5

x = 5/10

x = 1/2

f) 9x - 23 = 13x - 27

9x - 13x = -27 + 23

-4x = -4

x = -4/-4

x = 1

g) 7x - 19 = 6x + 3

7x - 6x = 3 + 19

x = 22

Answer 2

a) 7x+1-5x=9

2x+1=9

x=4

b)y + 9y + 5 = - 15

10y = - 15 - 5

10y = - 20

y = - 20/10

y = - 2

c)17x - 15x = 3 + 1

2x = 4

x = 2

d)16 - x = x + 25

-x - x = 25 - 16

-2x = 9

x = -9/2

e)  20x-13=20+9x

20x-9x= 20+13

11x= 33

x= 33/11

x=3

f) 21x+1=11x+6

21x-11x=+6-1

+10x=+5

x=10/5

x=2

g)9x - 23 = 13x - 27

9x - 13x = - 27 + 23

- 4x = - 4 (-1)

4x = 4

x = 4/4

x = 1