Question

Resolva as equações abaixo, considerando U=Q a) 2 (X - 16) = 8
b) 2 (9X - 4) - 7 +3 (6 - 5X) =18

c) 4X - 16 = - 4 X +32

Answer 1

a) 2x - 32 = 8

2x = 40

x = 20

b) 18x - 8 - 7 + 18 - 15x = 18

3x + 3 = 18

3x = 15

x = 3

c) 4x - 16 = - 4x + 32

8x = 48

x = 6

Espero ter ajudado

Answer 2

Explicação passo-a-passo:

a. 5x + 3x = 16

8x = 16

x = 16/8

x = 2

b. 7x - 2 - 5x = 18

7x - 5x = 18 + 2

2x = 20

x = 20/2

x = 10

c. 12x - 10x - 4 = 3

12x - 10x = 3 + 4

2x = 7

x = 7/2

d. 8x = 5x + 4,5

8x - 5x = 4,5

3x = 4,5

x = 4,5/3

x = 1.5

e. 4 (x + 1) = 12

4x + 4 = 12

4x = 12 - 4

4x = 8

x = 8/4

x = 2

f. 9x - 3(2x + 2) = 15

9x - 6x - 6 = 15

3x = 15 + 6

3x = 21

x = 21/3

x = 7

g. -3(x - 5) - 2(2x + 1) = -8

-3x + 15 - 4x - 2 = -8

-7x + 13 = -8

-7x = -8 - 13

-7x = -21 (: -1)

7x = 21

x = 21/7

x = 3

h. 22x +8 +2x + 4 = 18 -3x +3

22x + 2x + 3x = 18 + 3 - 4 - 8

27x = 9

x = 9/27 (:3)

x = 3/9 (:3)

x = 1/3

i. 9x - 2 = 4x + 18

9x - 4x = 18 + 2

5x = 20

x = 20/5

x = 4

j. 4x - 18 + 3x = 10

4x + 3x = 10 + 18

7x = 28

x = 28/7

x = 4

k. 7x + 1 = 5x - 7

7x - 5x = -7 - 1

2x = -8

x = -8/2

x = -4

L. 3(x + 2) - 1 = 2(x + 3) - 7

3x + 6 - 1 = 2x + 6 - 7

3x + 5 = 2x - 1

3x - 2x = -1 - 5

x = -6

m. 4(2m - 1) + 3m = 2(4m - 1) - (2 - m)

8m - 4 + 3m = 8m - 2 - 2 + m

8m + 3m - 8m - m = -4 + 4

3m - m = 0

2m = 0

m = 0/2

m = zero

n. 2(2x + 7 ) + 3(3x - 5) = 3(4x - 5 ) - 1

4x + 14 + 9x - 15 = 12x - 15 - 1

4x + 9x - 12x = -16 + 15 - 14

x = -15

O. 5(2x - 1 ) = 3(x + 10)

10x - 5 = 3x + 30

10x - 3x = 30 + 5

7x = 35

x = 35/7

x = 5

p. 5x - 91 = 4x - 77

5x - 4x = -77 + 91

x = 14

Espero ter te ajudado