Question

ajuda?

Resolva as seguintes equações:
a)3x = 15
b) 2x = 14 6
c) 4x = - 12
d) 7x = - 21
e) 13x = 13
f) 9x = - 9
g) 25x = 0
h) 35x = - 105
i) 4x = 1
j) 36x = 12
k) 21 = 3x
l) 84 = 6x *​

Answer 1

Explicação passo-a-passo:

a)3x = 15

x=15/3

x=5

b) 2x = 14+6

2x=20

x=20/2

x=10

c) 4x = - 12

x=-12/4

x=-3

d) 7x = - 21

x=-21/7

x=-3

e) 13x = 13

x=13/13

x=1

f) 9x = - 9

x=-9/9

x=-1

g) 25x = 0

x=0/25

x=0

h) 35x = - 105

x=-105/35

x=-3

i) 4x = 1

x=1/4

j) 36x = 12

x=12

36

x=12÷6

36÷6

x=2

6

x=2÷2

6÷2

x=1

3

k) 21 = 3x

-3x=-21 (-1)

3x=21

x=21/3

x=7

l) 84 = 6x

-6x=-84 (-1)

6x=84

x=84/6

x=14