Question

1- Resolva as equações corretamente:

A)X+X+X= 87
B) X-2X+4X=81
C)47+48+X=110
D)-47x=611
E) -10X=.10
F) -30X=9000
G) 2-3X-.9-4x
H) -4+5-7x-5-6x
I)4. (X+1)-12
J) 9.(N-3)+1=18
K)5 (3-X)=4x+18

Answer 1

Resposta:

A)X+X+X= 87

3x = 87

x = 87 / 3

x = 29

B) X-2X+4X=81

3x = 81

x = 81/3

x = 27

C)47+48+X=110

x = 110 - 47 - 48

x = 110 - 95

x = 15

D)-47x=611

x = 611/ (-47)

x = -13

E) -10X=.10

x = 10/(-10)

x = -1

F) -30X=9000

x = 9000/ (-30)

x = -300

G) 2-3X-9-4x

-3x - 4x -9 + 2

-7x -7

-7x = 7

x= 7/(-7)

x = -1

H) -4+5-7x-5-6x

-7x - 6x - 5 +5 - 4

-13x -4

-13x = 4

x = 4 / (-13)

x = -0,30

I)4. (X+1)-12

4x + 4 - 12

4x -8

4x = 8

x = 8 / 4

x = 2

J) 9.(N-3)+1=18

9n - 27 + 1 = 18

9n -26 = 18

9n = 18 + 26

9n = 44

n = 44/9

n = 4,88

K)5 (3-X)=4x+18

15 - 5x = 4x + 18

-5x - 4x = 18- 15

-9x = 3

x = 3 / (-9)

x = -0,33 ou -1 / 3

Espero ter ajudado!