Question

RESOLVA AS EQUAÇOES :

A) 20X-4=5X

B) 4X=8X+36

C) 4(X-3)=2X-5

D) 5(1-X)-2X+1=-3(2+X)

E) X-3=5

F)X-7=-7

G) 15=X+1


ME AJUDEM PRFV ......

Answer 1

A)

20X-4=5X

-4 = 5x - 20x

-4 = -15x

x = -15/-4

x = 3,75

B)

4X=8X+36

4x - 8x =36

-4x = 36

x = 36/-4

x = -9

C)

4(X-3)=2X-5

4.X - 3.4 = 2x-5

4x - 12 = 2x-5

4x = 2x - 7

4x - 2x = -7

2x = -7

X = -7/2

X = -3,5

D)

5(1-X)-2X+1=-3(2+X)

5.1-5.X-2X+1=-3.2+3.X

5 - 5X - 2X +1 = -6 + 3X

5 - 7X + 1 = -6 + 3X

5 + 1 = -6 + 3X + 7X

6 = -6 + 10X

6 + 6 = 10X

12 = 10X

X = 12/10

X = 1,2

E)

X-3=5

X = 5+3

X = 8

F)

X-7=-7

X = -7 +7

X = 0

G)

15=X+1

15 - 1 = X

X = 14

Espero ter ajudado.

Answer 2

A) 20X-4=5X

20x - 5x = 4

15x = 4

x= 4/15

B) 4X=8X+36

4x - 8x = 36

- 4x = 36

x= 36/-4

x= -9

C) 4(X-3)=2X-5

4x - 12 = 2x - 5

4x - 2x = - 5 + 12

2x = 7

x= 7/2

D) 5(1-X)-2X+1=-3(2+X)

5 - 5x - 2x + 1 = - 6 - 3x

6 - 7x = - 6 - 3x

- 7x + 3x = - 6 + 6

- 4x = 0

x= 0/-4

x= 0

E) X-3=5

x= 5 + 3

x= 8

F)X-7=-7

x= - 7 + 7

x= 0

G) 15=X+1

15 - 1 = x

14 = x

x= 14