Question

resolva a equaçao x-2(x-1)=4-3(x-2) e marque a alternativa que representa o valor de x
a)2
b)4
c)8
d)10
e)12

Answer 1

A )

4x - 3 - x + 8 = 11

4x - x = 11 + 3 -8

3x = 6

x = 6/3

x = 2

B )

6.(x - 2) = 12

6x - 12 = 12

6x = 12 + 12

6x = 24

x = 24/6

x = 4

C)

9 + 2.(5x - 4) = 21

9 + 10x - 8 = 21

10x = 21 - 9 + 8

10x = 20

x = 20/10

x= 2

D)

10x + 4.(3 - 2x) - 6 = 8

10x + 12 - 8x - 6 = 8

10x - 8x = 8 - 12 + 6

2x = 2

x = 2/2

x = 1

E)

3.(5 + 3x) + 5.(- x - 1) = 22

15 + 9x - 5x - 5 = 22

9x - 5x = 22 - 15 + 5

4x = 12

x = 12/4

x = 3

F )

2.(9x - 4) - 7 + (6 - 5x).3 = 18

18x - 8 - 7 + 18 - 15x = 18

18x - 15x = 18 + 8 + 7 - 18

3x = 15

x = 15/3

x = 5

espero ter ajudar você