Question

1) Resolva as equações a seguir:
a) x - 17 = -9 n) 3. (x +2) + 5 = x + 12

b) 2x = -7 o) x + 4.(x - 1) = 9 - 2.(x + 3)

c) 3x + 2 = 2x - 11 p) 5.(3x - 2) = 2.(6x + 3)

d) 2x = 16 q) 2.(3x-1) + 2 .(3-x)= 0

e) x = -5

f) 2x + 14 = 5x - 1


g) 4x - 5 = 6x + 11

h) 5x + 4 - 2x = 26 - 3x

i) 5m - 7 - 2m - 2 = 0

j) y - 8 + 5y = -3 +2y + 7

k) 4t + 9 = 3t + 5

Answer 1

a)x - 17 = -9

x = -9 + 17

x = 8

b)2x = -7

x = -7/2

c)3x + 2 = 2x - 11

3x - 2x = -11 - 2

x = -13

d)2x = 16

x = 8

e) x = -5 '-'

f)2x + 14 = 5x - 1

2x - 5x = -1 - 14

-3x = -15.(-1)

3x = 15

x = 5

g)4x - 5 = 6x + 11

4x - 6x = 11 + 5

-2x = 16.(-1)

2x = 16

x = 8

h)5x + 4 - 2x = 26 - 3x

5x - 2x + 3x = 26 - 4

6x = 22

x = 22/6

x = 11/3

i)5m - 7 - 2m - 2 = 0

5m - 2m = 2 + 7

3m = 9

m = 3

j)y - 8 + 5y = -3 + 2y + 7

y + 5y - 2y = -3 + 7 + 8

4y = 12

y = 3

k)4t + 9 = 3t + 5

4t - 3t = 5 - 9

t = -4

n)3.(x + 2) + 5 = x + 12

3x + 6 + 5 = x + 12

3x - x = 12 - 6 - 5

2x = 1

x = 1/2

o)x + 4.(x - 1) = 9 - 2.(x + 3)

x + 4x - 4 = 9 - 2x - 6

x + 4x + 2x = 9 - 6 + 4

7x = 7

x = 1

p)5.(3x - 2) = 2.(6x + 3)

15x - 10 = 12x + 6

15x - 12x = 6 + 10

3x = 16

x = 16/2

q)2.(3x - 1) + 2.(3 - x) = 0

6x - 2 + 6 - 2x = 0

6x + 2x = -6 + 2

8x = 4

x = 4/8

x = 1/2

Espero ter ajudado e

Bons estudos :)