Question

a) 4x-1=3 (x-1)
b) 3 (x-2) =2x-4
c) 2 (x-1) = 3x+4
d) 3 (x-4) = 2x-3
e) 7 (x-4)= 2x-3
f)3 (x-2)= 4 ( 3-x)
g)3 (3x-1)=2
h)7 (x-2)= 5 (x+3)
i)3 (2x-1)= 5 (x+3)
j)5x-3 (x+2)=15
k)2x+3x+9=8 (6-x)
l)4x+10-2 (x-5)= 0
m)3 (2x+3)-4 (x-1)=3
n)-7 (x-1)-2 (x-5)= 5x
o)2 (3-x)=3 (x-4) +5
p)3 (5-x) -3 (1-2x)= 42
q)(4x+6) -2x = (x-6) +10
r)-(x-3)-x+2+2 (x-1) -5
s)3x-2 (4x-3) = 2-3
t)-3 (x-1)-(3x+5) x-2 =18
u)5 (x-3) -4 (x+2) = 2+3 (1-2x)

me ajudem por favor?!

Answer 1

A)

4x - 1= 3. (x-1)

4x - 1 = 3x - 3

4x - 3x = - 3 + 1

x = - 2

b)

3 (x-2) =2x-4

3x - 6 = 2x - 4

3x - 2x = - 4 + 6

x = 2

c)

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

2x - 2 = 3x + 4

- 2 - 4 = 3x - 2x

- 6 = x

X = - 6

d)

3 (x-4) = 2x-3

3x - 12 = 2x - 3

3x - 2x = - 3 + 12

x = 9

e)

7. (x-4)= 2x-3

7x - 28 = 2x - 3

7x - 2x = - 3 + 28

5x = 25

x = 25/5

x = 5

f)

3.(x-2)= 4. ( 3-x)

3x - 6 = 12 - 4x

4x + 3x = 12 + 6

7x = 18

x = 18/7

g)

3.(3x - 1)=2

9x - 3 = 2

9x = 2 + 3

9x = 5

x = 5/9

h)

7.(x-2)= 5.(x+3)

7x - 14 = 5x + 15

7x - 5x = 15 + 14

2x = 29

x = 29/2

i)

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

6x - 3 = 5x + 15

6x - 5x = 15 + 3

x = 18

j)

5x - 3. (x+2)=15

5x - 3x - 6 = 15

2x - 6 = 15

2x = 15 + 6

2x = 21

x = 21/2

k)

2x+3x+9=8 (6-x)

5x + 9 = 48 - 8x

5x + 8x = 48 - 9

13x = 39

x = 39/13

x = 3

l)

4x+10-2 (x-5)= 0

4x + 10 - 2x + 10 = 0

2x + 20 = 0

2x = - 20

x = - 20/2

X = - 10

m)

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

6x + 9 - 4x + 4 = 3

2x + 13 = 3

2x = 3 - 13

2x = - 10

X = - 10/2

x = - 5

n)

- 7.(x-1) - 2.(x-5)= 5x

- 7x + 7 - 2x + 10 = 5x

- 9x + 17 = 5x

17 = 5x + 9x

17 = 14x

14x = 17

x = 17/14

o)

2. (3-x) = 3.(x-4) +5

6 - 2x = 3x - 12 + 5

6 - 2x = 3x - 7

6 + 7 = 3x - 2x

13 = x

X = 13

p)

3 (5-x) -3 (1-2x)= 42

15 - 3x - 3 + 6x = 42

12 + 3x = 42

3x = 42 - 12

3x = 30

x = 30/3

x = 10

q)

(4x+6) -2x = (x-6) +10

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

2x + 6 = x + 4

2x - x = 4 - 6

x = - 2

r)

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

- x + 3 - x + 2 = 2x - 2 - 5

- 2x + 5 = 2x - 7

5 + 7 = 2x + 2x

12 = 4x

4x = 12

x = 12/4

x = 3

s)

3x-2 + (4x-3) = 2-3

3x - 2 + 4x - 3 = - 1

7x - 5 = - 1

7x = - 1 + 5

7x = 4

x = 4/7

t)

-3. (x-1)-(3x+5) + x-2 =18

- 3x + 3 - 3x - 5 + x - 2 = 18

- 5x - 4 = 18

- 5x = 18 + 4

- 5x = 22 (-1)

5x = - 22

x = - 22/5

u)

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

5x - 15 - 4x - 8 = 2 + 3 - 6x

x - 23 = 5 - 6x

6x + x = 5 + 23

7x = 28

x = 28/7

x = 4