Question

Determine o valor do X nas seguintes equações do 1° grau:

a) X + 8 = 46

b) X + 126 = 435

c) X - 32= 12

d) X - 8= -10

e) 4x = 72

f) 9x = 54

g) 35x = -105

h) 6x = 12

i) X
---- = 15
5

j) X
---- = 12
8

k) 7x - 1 = 27

l) 6× = 2× + 28

m) 6× - 10 = 2× + 14

n) 4× + 4 = 12

Answer 1

a) X + 8 = 46 
 x=46-8
 x=38
b) X + 126 = 435
x=435-126
x=309
c) X - 32= 12
x=12+32
x=44
d) X - 8= -10 
x= -10+8
x= -2
e) 4x = 72
x=72/4
x=18
f) 9x = 54
x=54/9
x=6
g) 35x = -105
x=  -105/35
x= -3
h) 6x = 12 
x=12/6
x=2
i) X
---- = 15
5

x=5*15
x=75
j) X
---- = 12
8

x=8*12
x=96

k) 7x - 1 = 27
7x=27+1
7x=28
x=28/7
x=4
l) 6× = 2× + 28
6x-2x=28
4x=28
x=28/4
x=7
m) 6× - 10 = 2× + 14 
6x-2x=14+10
4x=28
x=28/4
x=7
n) 4× + 4 = 12
4x=12-4
4x=8
x=8/4
x=2