Question

1) Resolva as equações:

a) x + 5 = 8

b) x − 39 = −79

c) 4 = x – 10

d) 7x − 33 = −12

e) 33+ x = 5 – 3x

f) 35x = −105

g) 2x − 2 = 12 – 5x

h) 3(x + 3 ) – 5 = 22

i) 4(2m-1) + 3m = 2(4m-1) – (2 –m)

j) 5 (2x – 1 ) = 3 (x + 10)

k) 2(x + 5 ) – 4 = 26

l) 7y – 10 = y + 50

m) 2x – 10 + 7x + 10 = 180

n) 9x – 2 = 4x + 18

o) 3(3x +8) -5x = x – 3

p) 4(2x –1 ) = 3( x+2 )

q) 3(x + 2 ) – 1 = 2(x + 3) – 7

r) 7x + 1 = 5x – 7

s) 3(x + 1) + 2(2x – 3) = 5 (x – 1 ) + 8

Answer 1

Resposta:

a) x + 5 = 8

x = 8 - 5

x = 3

b) x − 39 = −79

x = -79 + 39

x = -40

c) 4 = x – 10

- x = -10 - 4

- x = -14 × (-1)

x = 14

d) 7x − 33 = −12

7x = - 12 + 33

7x = 21

x = 21 / 7

x = 3

e) 33+ x = 5 – 3x

x + 3x = 5 - 33

4x = -28

x = -28 / 4

x = 7

f) 35x = −105

x = -105 / 35

x = -3

g) 2x − 2 = 12 – 5x

2x + 5x = 12 + 2

7x = 14

x = 14 / 7

x = 2

h) 3(x + 3 ) – 5 = 22

3x + 9 - 5 = 22

3x + 4 = 22

3x = 22 - 4

3x = 18

x = 18 / 3

x = 6

i) 4(2m-1) + 3m = 2(4m-1) – (2 –m)

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

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

11m - 8m + m = - 6 - 2 + 4

3m + m = - 8 + 4

4m = - 4

m = - 4 / 4

m = - 1

j) 5 (2x – 1 ) = 3 (x + 10)

10x - 5 = 3x + 30

10x - 3x = 30 + 5

7x = 35

x = 35 / 7

x = 5

k) 2(x + 5 ) – 4 = 26

2x + 10 - 4 = 26

2x + 6 = 26

2x = 26 - 6

2x = 20

x = 20 / 2

x = 10

l) 7y – 10 = y + 50

7y - y = 50 + 10

6y = 60

y = 60 / 6

y = 10

m) 2x – 10 + 7x + 10 = 180

2x + 7x + 10 - 10 = 180

9x = 180

x = 180 / 9

x = 20

n) 9x – 2 = 4x + 18

9x - 4x = 18 + 2

5x = 20

x = 20 / 5

x = 4

o) 3(3x +8) -5x = x – 3

9x + 24 - 5x = x - 3

9x - 5x + 24 = x - 3

4x + 24 = x - 3

4x - x = - 3 - 24

3x = - 27

x = - 27 / 3

x = - 9

p) 4(2x –1 ) = 3( x+2 )

8x - 4 = 3x + 6

8x - 3x = 6 + 4

5x = 10

x = 10 / 5

x = 2

q) 3(x + 2 ) – 1 = 2(x + 3) – 7

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

3x + 5 = 2x - 1

3x - 2x = - 1 - 5

x = - 6

r) 7x + 1 = 5x – 7

7x - 5x = - 7 - 1

2x = - 8

x = - 8 / 2

x = - 4

s) 3(x + 1) + 2(2x – 3) = 5 (x – 1 ) + 8

3x + 3 + 4x - 6 = 5x - 1 + 8

3x + 4x + 3 - 6 = 5x - 1 + 8

7x - 3 = 5x + 7

7x - 5x = 7 + 3

2x = 10

x = 10 / 2

x = 5

Espero ter ajudado!❤

Answer 2

Resposta:

resposta

Explicação passo-a-passo:

1-2-3-4-5-7-6-8-90-