Question

VALENDO 50 PONTOS

Resolva as equações

Answer 1

a)6x=2x+16
   6x-2x=16
   4x=16
   x=$\frac{16}{4}$
   x=4

b)4x-10=2x+2
   4x-2x=10+2
   2x=12
   x=$\frac{12}{2}$
   x=6

c)2x+1=4x-7
   -4x+2x=-7+1
   -2x=-6
   -2x.(-1)=-6.(-1)
   2x=6
   x=$\frac{6}{2}$
   x=3

d)3x-2=4x+9
   3x-4x=9+2
   -x=11
   -x.(-1)=11.(-1)
   x=-11

e)5x+4=3x-2x+4
   5x-3x+2x=4-4
   4x=0
   x=$\frac{0}{4}$
   x=0

f)x+x-4=17-2x+1
  x+x+2x=17+4+1
  4x=22
  x=$\frac{22}{4}$
  x=5,5

g)3,6x-2,6=x-0,92
   3,6x-x=2,6-0,92
   2,6x=1,68
   x=$\frac{1,68}{2,6}$
   x≈0,646

h)0,1x+3x+0,9x=14+2x
   0,1x+3x+0,9x-2x=14
    2x=14
    x=$\frac{14}{2}$
    x=7
__________________________

Espero ter ajudado. Bons estudos ;)

Answer 2

Resposta:

a) x = 4

b) x = 6

c) x = 4

d) x = - 11

e) x = 0

f) x = 11/2

g) x = 0,7

h) x = 7

Explicação passo-a-passo:

a) 6x = 2x + 16

6x - 2x = 16

4x = 16

x = 16/4

x = 4

b) 4x - 10 = 2x + 2

4x - 2x = 2 + 10

2x = 12

x = 12/2

x = 6

c) 2x + 1 = 4x - 7

2x - 4x = - 7 - 1

- 2x = - 8

x = - 8 / - 2

x = 4

d)  3x - 2 = 4x + 9

3x - 4x = 9 + 2

- x = 11

x = - 11

e) 5x + 4 = 3x - 2x + 4

5x + 4 = x + 4

5x - x = 4 - 4

4x = 0

x = 0/4

x = 0

f) x + x - 4 = 17 - 2x + 1

2x - 4 = 18 - 2x

2x + 2x = 18 + 4

4x = 22

x = 22/4 (÷ 2)

x = 11/2

g) 3,4x - 2,6 = x - 0,92

3,4x - x = - 0,92 + 2,6

2,4x = 1,68

x = 1,68/2,4

x = 0,7

h) 0,1x + 3x + 0,9x = 14 + 2x

4x = 14 + 2x

4x - 2x = 14

2x = 14

x = 14/2

x = 7