Question

Resolva as equações exponenciais.

a) 5x = 25 b) 2x = 16 c) 7x = 75

Answer 1

Olá!

a) 5x = 25

x = 25/5

x = 5

b) 2x = 16

x = 16/2

x = 8

c) 7x = 75

x = 75/7

:)

Answer 2

A)

6x = 2x + 16

6x - 2x = 16

4x = 16

x = 16/4

x = 4

B)

2x-5=x+1

2x - x = 1 + 5

x = 6

C)

2x+3=x+4

2x - x = 4 - 3

x = 1

D)

5x+7=4x+10

5x - 4x = 10 - 7

x = 3

E)

4x-10=2x+2

4x - 2x = 2 + 10

2x = 12

x = 12/2

x = 6

F)

4x-7=8x-2

4x - 8x = -2 + 7

-4x = 5 .(-1)

4x = -5

x = -5/4

G)

2x+1=4x-7

2x - 4x = -7 - 1

-2x = -8 .(-1)

2x = 8

x = 8/2

x = 4

H)

9x+9+3x=15

9x + 3x = 15 - 9

12x = 6

x = 6/12

x = 3/6

x = 1/3

I)

16x-1=12x+3

16x - 12x = 3 + 1

4x = 4

x = 4/4

x = 1

J)

3x-2=4x+9

3x - 4x = 9 + 2

-x = 11 .(-1)

x = -11

K)

5x+-3+x=2x+18

5x + x - 2x = 18 + 3

6x - 2x = 21

4x = 21

x = 21/4

L)

17x+7x=x+18

24x - x = 18

23x = 18

x = 18/23

M)

x+x-4=17-2

2x = 15 + 4

2x = 19

x = 19/2

N)

x+2x+4-5x=4x-9

3x - 5x - 4x = -9 - 4

3x - 9x = - 13

-6x = -13 .(-1)

6x = 13

x = 13/6

O)

5x+6x=3x+2x-4

11x - 3x - 2x = -4

11x - 5x = -4

6x = -4

x = -4/6

x = -2/3

P)

5x+4=3x-2x+4

5x - 3x + 2x = 4 - 4

2x + 2x = 0

4x = 0

x = 0/4

x = 0

Espero ter ajudado