Question

Solucione as equações e encontre os valores da incógnitas: a) 3X – 4 = 2X + 8
b) 7X – 2 + 4 = 10 + 5X
c) 5X -4 = 7X + 1 – 3
d) 20x - 4 = 5x
e) 4x = - 8x + 36
f) x - 3 - 2 + 3X = 5X – 2 - 6X
g) 6x – 4 + 2x = 2x + 8
h) 17x - 2 + 4 = 10 + 5x
i) 4x – 10 = 2x + 2 + 3x
j) 5x + 6x – 16 = 3x + 2x – 4​

Answer 1

Resposta:

Explicação passo a passo:

a) 3x - 4 = 2x + 8

3x- 2x = 8+ 4

x= 12

b)7x - 2 + 4 = 20 + 5x

7x - 5x = 10 + 2 - 4

2x = 12-4

2x = 8

x = 8/2

x= 4

c)5x-4=7x+1-3

5x-7x=1-3+4

2x=5-8

2x=2

x=2/2

x=1

d)20x-4=5x

20x-5x=4

15x=4

x=4/15

e)4x=8x+36

4x-8x=36

4x=36

x=36/4

x=9

f)x+3+2+3x=5x-2-6x

x+3x-5x+6x=-2+3+2

10x-5x=3

5x=3

x=3/5

g)6x-4+2x=2x+8

6x+2x-2x=8+4

6x=12

x=12/6

x=2

h) 17x-2+4=10+5x

17x-5x=10+2-4

12x=12-4

12x=8

x=8/12

x=2/3

i)4x-10=2x+2+3x

4x-5x=12

x=12

j)5x+6x-16=3x+2x-4

11x-5x=12

6x=12

x=12/6

x=2

Answer 2

Resposta:

a) x=12

b) x=4

c) x= -1

d) x= 4/15

e) x=3

f) x= 3/5 ou 0,6

g) x =2

h) x= 8/12

i) x= -12

j) x = 2

Explicação passo a passo:

a)

3X – 4 = 2X + 8

3x-2x=8+4

x=12

b)

7X – 2 + 4 = 10 + 5X

7x-5x=10+2-4

2x=8

x=8/2

x=4

c)

5X -4 = 7X + 1 – 3

5x-7x=1-3+4

-2x=2

x=2/-2

x=-1

d)

20x - 4 = 5x

20x-5x=4

15x=4

x=4/15

e)

4x = - 8x + 36

4x+8x=36

12x=36

x=36/12

x=3

f)

x - 3 - 2 + 3X = 5X – 2 - 6X

x+3x-5x+6x= -2+2+3

5x=3

x=3/5 ou 0,6

g)

6x – 4 + 2x = 2x + 8

6x+2x-2x=8+4

6x=12

x=12/6

x=2

h)

17x - 2 + 4 = 10 + 5x

17x-5x=10-4+2

12x=8

x=8/12

i)

4x – 10 = 2x + 2 + 3x

4x-2x-3x=2+10

-x=12

x=-12

j)

5x + 6x – 16 = 3x + 2x – 4​

5x+6x-3x-2x=-4+16

6x=12

x=12/6

x=2