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)
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Respostas
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