Question

Resolva as equações
a) 4 (x+1)=12
b) 9 (x-3)+1 =18
c) 5 (3- x) = 4x + 18
d) 9x - 3(2x + 2) = 15
e) 5 (3-X) =2 (x-4) +15
f) 3 (2x - 1) = -2 (x + 3)
g) 3 (x - 2) - 5(x - 1)= -7
h) 4(x+10) -2 (x - 5) = 0​

Answer 1

a) 4(x + 1) = 12

4x + 4 = 12

4x = 8

x = 8/4

x = 2

b) 9 (x-3)+1 =18

9x - 27 + 1 = 18

9x = 18 + 26

x = 44/9

c) 5 (3- x) = 4x + 18

15 - 5x = 4x + 18

- 9x = 3

x = 3/- 9

x = - 1/3

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

9x - 6x - 6 = 15

3x = 21

x = 7

e) 5 (3-X) =2 (x-4) +15

15 - 5x = 2x - 8 + 15

- 7x = - 8

x = 8/7

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

6x - 3 = - 2x - 6

8x = - 3

x = - 3/8

g) 3 (x - 2) - 5(x - 1)= -7

3x - 6 - 5x + 5 = - 7

- 2x = - 6

x = 6/2

x = 3

h) 4(x+10) -2 (x - 5) = 0

4x + 40 - 2x + 10 = 0

2x = - 50

x = - 50/2

x = - 25

Abraço <3