Question

a) 4x - 1 - 3 (x - 1) _______

b) 3 (x - 2) = 2x - 4 _____

c) 2 (x - 1) = 3x + 4 _______

d) 3 ( x - 1) - 7 = 15 ________

e) 7 ( x - 4) = 2x - 3 _______

f) 3 ( x - 2 ) = 2 ( 3x + 2 ) ______

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

h) 7 ( x - 2 ) = 5 ( x - 3) ______

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

j) 5x - 3 ( x + 2 ) = 15​ ____

Answer 1

Resposta:

Explicação passo-a-passo:

a) 4x - 1 - 3 (x - 1)

4x-1-3x+3=0

4x-3x=1-3

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-x=3x+4

2x-x-3x=4

x-3x=4

-2x=4 .(-1)

2x=-4

x=-4/2

x=-2

d) 3 ( x - 1) - 7 = 15

3x-3-7=15

3x=15+3+7

3x=25

x=25/3

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 ) = 2 ( 3x + 2 )

3x-6=6x+4

3x-6x=4+6

-3x=10 .(-1)

x=-10/3

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

9x-3=6x+4

9x-6x=4+3

3x=7

x=7/3

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

7x-14=5x-15

7x-5x=-15+14

2x=-1

x=-1/2

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