Question

1) Resolva as seguintes equações sendo U=Q

a) 3x=15
b)2x=14
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

Boa tarde Larissa

a) 3x=15,   x = 15/3 = 5
b)2x=14,   x = 14/2 = 7
c)4x=-12,  x = -12/4 = -3
d)7x=-21,  x = -21/7 = -3
e)13x=13, x = 13/13 = 1
f)9x=-9,  x = -9/9 = -1
g)25x=0, x = 0
h)35x=-105, x = -105/35 = -3
i)4x=1, x = 1/4
j)36x=12,  x = 12/36 = 1/3
k)21=3x , x = 21/3 = 7
l)84=6x, x = 84/6 = 14

Answer 2

a) 3x = 15
x = 15/3
x = 5

b) 2x = 14
x = 14/2
x = 7

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 (÷ 12)
x = 1/3

k) 21 = 3x
21/3 = x
x = 7

l) 84 = 6x
84/6 = x
x = 14