Question

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Resolva as seguintes equação:

a) 3x = 2x – 23
b) 7x – 5 = x + 37
c) 5x + 5 = 35
d) 5x – 5 = 4x + 14
e) 6x – 8 = 4x + 22
f) 3x + 3 + 2x = 3x – 15
g) 4x – 4 = 2x + 12
h) 7x – 15 = 4x + 15
i) 10x + 30 = 4x – 6
j) 9x + 6 = 3x + 2x + 10
k) 7x – 7 = 3 – 3x
l) 4x – 1 + 2x – 7 = 4x – 8
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Answer 1

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a) 3x = 2x – 23

3x -2x = -23

x = -23

b) 7x – 5 = x + 37

7x -x = 37 + 5

6x = 42

x = 42/6

x= 7

c) 5x + 5 = 35

5x = 35 - 5

5x = 30

x = 30/5

x = 6

d) 5x – 5 = 4x + 14

5x -4x = 14 + 5

x = 19

e) 6x – 8 = 4x + 22

6x -4x = 22+8

2x = 30

x = 30/2

x = 15

f) 3x + 3 + 2x = 3x – 15

3x + 2x -3x = -15 -3

2x = - 18

x = -18/2

x = -9

g) 4x – 4 = 2x + 12

4x -2x = 12 + 2

2x = 14

x = 14/2

x = 7

h) 7x – 15 = 4x + 15

7x -4x = 15 + 15

3x = 30

x = 30/3

x = 10

i) 10x + 30 = 4x – 6

10x-4x = -6-30

6x = -36

x=-36/6

x= -6

j) 9x + 6 = 3x + 2x + 10

9x -3x -2x = 10 -6

4x = 4

x = 4/4

x =1

k) 7x – 7 = 3 – 3x

7x +3x = 3 + 7

10x = 10

x = 10/10

x = 1

l) 4x – 1 + 2x – 7 = 4x – 8

4x + 2x-4x = -8 +1 +7

2x = -8 +8

2x = 0

x = 0/2

x = 0