Question

a) 2x - 6 = 8
b) 2x - 8 = 6
c) 3x - 7 = 8
d) 4x -12 = 12
e) 5x + 5 = 20
f) 4x - 6 = 2x + 6
g) 3x - 7 = x + 8

Equações de 1 grau,preciso da resposta de todas.

Answer 1

a)

2x - 6= 8

2x= 8 + 6

2x= 14

x= 14/2

x= 7

b)

2x - 8= 6

2x= 6 + 8

2x= 14

x= 14/2

x= 7

c)

3x - 7= 8

3x= 8 + 7

3x= 15

x= 15/3

x= 5

d)

4x - 12= 12

4x= 12 + 12

4x= 24

x= 24/4

x= 6

e)

5x + 5= 20

5x= 20 - 5

5x= 15

x= 15/5

x= 3

f)

4x - 6= 2x + 6

4x - 2x= 6 + 6

2x= 12

x= 12/2

x= 6

g)

3x - 7= x + 8

3x - x= 8 + 7

2x= 15

x= 15/2

Answer 2

Explicação:

$\\a) 2x - 6 = 8\\2x = 8 +6\\2x = 14\\x = \frac{14}{2} \\x = 7$

$b) 2x - 8 = 6\\2x = 6 + 8\\2x = 14\\x = \frac{14}{2} \\x = 7$

$c) 3x - 7 = 8\\3x = 8 + 7 \\3x = 15\\x = \frac{15}{3} \\x = 5$

$d) 4x -12 = 12\\4x = 12 + 12\\4x = 24\\x = \frac{24}{4} \\x = 6$

$e) 5x + 5 = 20\\5x = 20 - 5\\5x = 15\\x = \frac{15}{5} \\x = 3$

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

$g) 3x - 7 = x + 8\\3x - x = 8 + 7 \\2x = 15\\x = \frac{15}{2} \\x = 7,5$