Question

Responder só as marcadas com uma bolinha
Ou risquinho.


preciso disso rapido

Answer 1

Resposta:

5) 10

8) 1/40

10) 14

11) 6/7

17) -60

18) -9

19) 30

20) 1

22) 21

24) -1/3

Explicação passo a passo:

5)

6x-17=2x+23

6x-2x=23+17

4x=40

4x/4=40/4

x=10

8)

x+3/8=2/5

x=2/5-3/8

MMC:

8 - 5 | 2

4 - 5 | 2

2 - 5 | 2

1 - 5 | 5

1 - 1 | Total: 40

x = 16-15/40

x= 1/40

10)

6x/7-12 = 0

(7.) 6x/7=12 (.7)

6x=84

x=14

11)

3x/8 + 1/4 = 2x/3

MMC

8 - 4 - 3 |2

4 - 2 - 3 |2

2 - 1 - 3 |2

1 - 1 - 3 |3

1 - 1 - 1 | Total: 2.2.2.3= 24

9x/24 + 6/24 (*24)= 16x/24 (*24)

9x + 6 = 16x

16x - 9x = 6

7x = 6

x = 6/7

17)

(5*) x+12=4x/5 (*5)

5x + 60 = 4x

5x-4x = -60

x = -60

18)

8x + 17 = -55

8x = -55 - 17

8x = -72

x = -9

19)

x/6 + 2 = 7

x/6 = 7-2

x= 5 * 6

x= 30

20)

-5x/7 + 7x/5 = 24/35

MMC

7 - 5 | 5

7 - 1 | 7

1 - 1 | Total: 35

(35*) -25x+49x/35 = 24/35 (*35)

-25x + 49x = 24

24x = 24

x= 1

22)

x + (-2) = 19

x - 2 = 19

x = 19 + 2

x = 21

24)

5x + 2 = 1/3

(3*) 5x + 2 = 1/3 (*3)

15x + 6 = 1

15x = -5

x = -5/15 -> -1/3