Question

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b) 7y – 10 = y + 50 *

c) 3 (x + 1) + 2 (2x – 3) = 5 (x – 1 ) + 8 *

d) 5 (2x – 1 ) = 3 (x + 10) *

e) 7p + 17 – 5p + 10 = – 17 + 13p *

f) 3 (x – 2) – (1 – x) = 13 *

g) 2y + 21 – 6y = – 12 + y – 7 *

h) 5 – 4 (x – 1) = 4x – 3 (4x – 1) – 4 *

i) – 5 (2t+ 3) = 6 (4 – t) – 55 *

j) 2 (x – 3 ) + 8x +4 = 5 (x + 2 ) *

k) 3 (3x +8) – 5x = x – 3 *

l) 3x + 5 + 2x + 6= x + 27 – 16 *

m) 3 (x + 1 ) + 2 = 5 + 2 (x – 1) *

n) 3 (y – 3) + 4 = 2 [– (y – 5) – 4 (2y + 1)] *

Answer 1

Resposta:b) 7y - 10 = y + 50

7y - y = 50 + 10

6y = 60

y = 60/6

y = 10

c)3 (x + 1) + 2 (2x - 3) = 5 (x - 1) + 8

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

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

2x = 6

x = 6

2

x = 3

d)5(2x - 1) = 3(x + 10)

10x - 5 = 3x + 30

10x - 3x = 30 + 5

7x = 35

x = 35/7

x = 5

e)7p + 15 - 5p + 10 = -17 + 13p

15 + 10 + 17 = 13p -7p + 5p

42 = 11p

p = 42 / 11

p = 3,81

f)3(X-2)-(1-X)=13

3x-6-1+x=13

4x=13+6+1

4x=20

x=5

g)2y + 21 - 6y = - 12 + y - 7

2y - 6y - y = - 12 - 7 - 21

- 5y = - 40 . (-1)

5y = 40

y = 40/5

y = 8

h)5 - 4(x-1) = 4x - 3(4x-1) - 4

5 - 4x+4 = 4x -12x + 3 - 4

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

4x = -10

x = - 10/4

x = - 5/2.

i)6 (4 - t) - 55 = - 5 (2t + 3)

24 - 6t - 55 = - 10t - 15

- 6t + 10t = ​- 15 - 24 + 55

4t = 16

t = 16/4

t = 4

j)2(x - 3) + 8x + 4 = 5(x + 2)

2x - 6 + 8x + 4 = 5x + 10

2x + 8x - 5x = 10 - 4 + 6

5x = 12

x = 12/5

k)3 ( 3x + 8 ) - 5x = x - 3

9x + 24 - 5x = x - 3

9x - 5x - x = - 3 - 24

4x - x = - 3 - 24

3x = - 27

x = - 27/3

x = - 9

S = { - 9 }

l)3x + 5 + 2x + 6 = x + 27

5x + 11 = x + 27

5x - x = 27 - 11

4x = 16

x = 16 ÷ 4

x = 4

m)3x + 3 + 2 = 5 + 2x - 2

3x + 5 = 3 + 2x

3x - 2x = 3 - 5

x = -2

n)3(y-3)+4=2[ -(y-5)-4(2y+1)]

3y - 9 + 4 = 2[ - y + 5 - 8y - 4]

3y -5 = -2y + 10 - 16y - 8

3y + 18y = 10 + 5 - 8

21y = 7

y = 7/21

y = 1/3

Explicação passo-a-passo: