Question

resolva as seguintes equações.

a)4x – 1 = 3 ( x – 1 )
b)3 ( x – 2) = 2x – 4
c)2 ( x- 1 ) = 3x + 4
d)7 ( x – 4 ) = 2x – 3
e)3 ( x – 2) = 4 (3 – x)
f)6x = 2x + 16
g)2x – 5 = x = 1
h)5x + 7 = 4x + 10
i)4x – 10 = 2x + 2
j)5x – 3 + x = 2x + 9
k)X + 2x + 3 – 5x + 4x – 9
l)9x + 9 + 3x = 15
​

Answer 1

Resposta:

a) x= -2

b)x=2

c)x=6

d)x=5

e)x=18/7 ou 0,38

f)x=4

g)x=6

h)x=3

i)x=6

j)x=3

k)x=3

l)x=1/2

Explicação passo-a-passo:

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

2x-3x=4+2

-x=6  (-1)

x=6

d)7 ( x – 4 ) = 2x – 3

7x-28=2x-3

7x-2x= -3+28

5x=25

x=25/5

x=5

e)3 ( x – 2) = 4 (3 – x)

3x-6=12-4x

3x+4x=12+6

7x=18

x=18/7

x=0.38

f)6x = 2x + 16

6x-2x=16

4x=16

x=16/4

x=4

g)2x – 5 = x + 1

2x-x=1+5

x=6

h)5x + 7 = 4x + 10

5x-4x=10-7

x=3

i)4x – 10 = 2x + 2

4x-2x=2+10

2x=12

x=12/2

x=6

j)5x – 3 + x = 2x + 9

5x+x-2x=9+3

4x=12

x=3

k)X + 2x + 3 - 5x + 4x – 9  = 0

x+2x-5x+4x= -3+9

2x=6

x=6/2

x=3

l)9x + 9 + 3x = 15

9x+3x=15-9

12x=6

x=6/12

simplificação

6     (:6)      1

12    (:6)     2

x=1/2