Question

me ajudemm pfvv
9) Resolva as seguintes equações:
a) x + 6 = 5
b) 4x=-12
c)2x= 4
5
d) 6x = 2x + 16
e) 2x-5=x+1
f) 2x + 1 = 4x 47
g) x - 109 = 5
h) 4x = 1
i)4x - 7 = 8x - 2
j)9x + 9 + 3x = 15
k) 5x + 7 = 4x + 10​

Answer 1

Resposta:

a) x + 6 = 5

x = 5 - 6

x = -1

b) 4x = -12

x = -12/4

x = -3

c) 2x = 4 + 5

2x = 9

x = 9/2

x = 4,5

d) 6x = 2x + 16

6x -2x = 16

4x = 16

x = 16/4

x = 4

e) 2x - 5 = x +1

2x - x = +5 + 1

x = 6

f) 2x + 1 = 4x + 47

2x - 4x = 47 -1

-2x = 46  . ( 1)

2x = -46

x = 46/2

x = 23

g) x - 109 = 5

x =  5 + 109

x = 114

h)  4x = 1

x = 1/4

x = 0,25

i) 4x  - 7 = 8x - 2

4x - 8x = - 2 - 7

-4x = -9 .(1)

4x = 9

x = 9/4

x = 2,25

j) 9x + 9 + 3x = 15

9x + 3x = 15 - 9

12x = 6

x = 6/12

x = 0,5

k) 5x + 7 = 4x + 10​

5x - 4x = +10 - 7

X = 3