Question

Encontre o valor de x:

a)3(2x-3) +2 (x+1) = 3x+18.

b)2x+3 (2x-5) = 4x+9.

c)2x-16= 14-17x.

d)4x-1=3 (x-1).
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Answer 1

a)

3(2x - 3) + 2(x + 1)= 3x + 18

6x - 9 + 2x + 2= 3x + 18

6x + 2x - 3x= 18 + 9 - 2

5x= 25

x= 25/5

x= 5

b)

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

2x + 6x - 15= 4x + 9

2x + 6x - 4x= 9 + 15

4x= 24

x= 24/4

x= 6

c)

2x - 16= 14 - 17x

2x + 17x= 14 + 16

19x= 30

x= 30/19

d)

4x - 1= 3(x - 1)

4x - 1= 3x - 3

4x - 3x= - 3 + 1

x= - 2