Question

resolva as equaçoes, sendo U=Q:

a)4(x+1)=12
b)9(x-3)+1=18
c)5(3-x)-4x+8
d)9x-3(2x+2)=15
e)5(4-x)=2(x-4)+15​

Answer 1

Olá....

a)

4(x + 1) = 12

4x + 4 = 12

4x = 12 - 4

4x = 8

x = 8/4

x = 2

b)

9(x - 3) + 1 = 18

9x - 27 + 1 = 18

9x  - 26 = 18

9x = 18 + 26

9x = 44

x = 44/9

c)

5(3 - x) - 4x + 8

15 - 5x - 4x + 8

- 9x + 23

d)

9x - 3(2x + 2) = 15

9x - 6x - 6 = 15

3x = 15 + 6

3x = 21

x = 21/3

x = 7

e)

5(4 - x) = 2(x - 4) + 15

20 - 5x = 2x - 8 + 15

20 - 5x = 2x + 7

- 5x - 2x = 7 - 20

- 7x = 13 ⇒*(- 1)

7x = - 13

x = - 13/7

Bons estudos.​