Question

a) 23x - 16 = 14 - 17x
b) (x - 5)/10 + (1 - 2x)/5 = (3-x)/4
c) 5x – 3 + x = 2x = 9
d)3 ( 3x -1 ) = 2 ( 3x + 2 )

Answer 1

Resposta:

Explicação passo-a-passo:

A)

23x - 16 = 14 - 17x

23x+17x = 14+16

40x = 30 (:10)

4x = 3

X = 3/4

__________

b)

(x - 5)/10 + (1 - 2x)/5 = (3-x)/4

Mmc (10,5,4)= 20

[2.(x-5) + 4.(1-2x)]/20 = [5.(3-x)]/20

2x - 10 + 4 - 8x = 15 - 5x

- 6x - 6 = 15 - 5x

-15-6= 6x - 5x

- 21 = x

x = - 21

______________

c)

5x – 3 + x = 2x + 9

6x - 3 = 2x + 9

6x - 2x = 9+3

4x = 12

X = 12/4

X = 3

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d)

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

9x - 3 = 6x + 4

9x - 6x = 4+3

3x = 7

x = 7/3