Question

Resolva as seguintes equações:
a) x+5 = 8
b) x+6 = 5
c) x-7 = -7
d) 3x = 15
e) 2x = 14
f) 36x = 12
g) 3x-4 = 2x+8
h) 6x = 2x + 16
i) 2x+3 = x+4
j) 4 (x+3) = 1
k) 5 (2x-4) = 7 (x+1) - 3

Answer 1

Boa noite!

Vamos la!

a) x+5 = 8 
x=8-5
x=3

b) x + 6 = 5
x= 5 - 6
x= -1

c) x - 7 = -7
x= 7-7
x=0

d) 3x = 15
x=15/3
x=5

e) 2x=14
x=14/2
x=7

f) 36x = 12
x=12/36
simplificando

x=2/6
x=1/3

g) 3x-4=2x+8
3x - 2x = 8 + 4
1x = 12
x=12

h) 6x=2x +16
6x-2x=16
4x=16
x=16/4
x=4

i)2x + 3 = x + 4
2x - x = 4 - 3
x = 1

j) 4 (x + 3) = 1
aplique propriedade distributiva

12 + 4x = 1
4 x = 1 - 12
x= -11/4

k) 5 (2x-4) = 7 (x+1) - 3
-20 + 10x = 7 + 7x -3 (7-3 = 4)
10x - 7x = 20 + 4
3x = 24
x=24/3

x = 8

Bons estudos

Answer 2

a)x=8-5=3
b)x=11
c)0
d)15/3=5
e)x=14/2=7
f)x=12/36=1/3
g)3x-2x=8+4=x+12
h)6x-2x=16 4x=16   x=16/4  x=4
i)2x-x=4-3  x=1
j)4x+12=1  4x=1-12    x=-11/4
k)10x-20=7x+7-3    10x-7x=20+4     3x=24  x=24/3  x=8