Question

) Resolva as seguintes equações:



A) 4x – 1 = 3(x – 1) f) 3(x – 2) = 4(3 – x)

B) 3(x – 2) = 2x – 4 g) 3(3x – 1) = 2(3x + 2)

C) 2(x – 1) = 3x + 4 h) 7(x – 2) = 5(x + 3)

D) 3(x – 1) – 7 = 15 i) 3(2x – 1) = – 2(x + 3)

E) 7(x – 4) = 2x – 3 j) 5x – 3(x + 2) = 15



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

2x - 3x= 4 - 2

- 1x= 2 >>.(-1)

1x= - 2

x= - 2/1

x= - 2

D)

3(x - 1) - 7= 15

3x - 3 - 7= 15

3x= 15 + 3 + 7

3x= 25

x= 25/5

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

3x + 4x= 12 + 6

7x= 18

x= 18/7

G)

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

9x - 9= 6x + 4

9x - 6x= 4 + 9

3x= 13

x= 13/3

H)

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

7x - 14= 5x + 15

7x - 5x= 15 + 14

2x= 29

x= 29/2

I)

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

6x - 3= - 2x - 6

6x + 2x= - 6 + 3

8x= - 3

x= - 3/8

J)

5x - 3(x + 2)= 15

5x - 3x - 6= 15

5x - 3x= 15 + 6

2x= 21

x= 21/2