Question

1)Resolva as seguintes equações:
a) 3x=15
b) 2x=14
c) 4x=-12
d) 7x=-21
e) 13x=13
f) 9x=-9
g) 25x=0
h) 35x=105

2)Resolva:
a) x/3=7
b)x/4=-3
c)2x/ d)2x/3=-10
e)3x/4=30
f)2x/5=-18

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

4)Resolva:
a)5x-3+x=2x+9
b)17x-7x=x+16
c)x+x-4=17-2x+1
d)x+2x+3-5x=4x+9
e)5x+6x-16=3x+2x-4
f)5x+4+3x-2x+4

gente deixa a conta pfv, preciso disso pra amanha!
Obg

Answer 1

Olá bom dia!

Resolução das Questões:

1°)

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



2°)

a) x/3 =7 MMC = {(3)}
x = 21


b) x/4 = -3 MMC = {(4)}
x = -12


c) Não compreendi


d) 2x/3 = -10 MMC = {(3)}
2x = -30
x = -30/2
x = -15

e) 3x/4 = 30 MMC = {(4)}
3x = 120
x = 120/3
x = 40


f) 2x/5 = -18 MMC = {(5)}
2x = -90
x = -90/2
x = -45




3°)

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


b) 2x - 5 = x + 1
2x - x = 1 + 5
x = 6


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

d) 5x + 7 = 4x + 10
5x - 4x = 10 - 7
x = 3

e) 4x - 10 = 2x + 2
4x - 2x = 2 + 10
2x = 12
x = 12/2
x = 6

f) 4x - 7 = 8x - 2
4x - 8x = -2 + 7
- 4x = 5 ×(-1)
4x = -5
x = -5/4

g) 2x + 1 = 4x - 7
2x - 4x = - 7 - 1
- 2x = -8 ×(-1)
2x = 8
x = 8/2
x = 4

h) 9x + 9 + 3x = 15
9x + 3x = 15 - 9
12x = 6
x = 6/12
x = 2

i) 16x - 1 = 12 + 3
16x = 15 + 1
16x = 16
x = 16/16
x = 1

j) 3x - 2 = 4x + 9
3x - 4x = 9 + 2
-x = 11 ×(-1)
x = - 11



4°)

a) 5x - 3 + x = 2x + 9
5x + x - 2x = 9 + 3
4x = 12
x = 12/4
x = 3

b)17x - 7x = x + 16
10x - x = 16
9x = 16
x = 16/9

c)x+x-4=17-2x+1
2x + 2x = 17 + 1 + 4
4x = 22
x = 22/4
x = 11/2

d)x+2x+3-5x=4x+9
3x - 5x - 4x = 9 - 3
- 6x = 6 ×(-1)
6x = -6
x = - 6/6
x = -1

e)5x+6x-16=3x+2x-4
11x - 3x - 2x = - 4 + 16
6x = 12
x = 12/6
x = 2

f)Essa equação não apresenta sinal de igualdade.