Question

resolva:

a)x+5=10

 

b)3x-12=-6

 

c)12x+7=-x+3

 

d)x/5 +12=6 

 

e)12/x+6=-1

Answer 1

$a) x=10-5 \\ x=5$

$b) 3x-12=-6 \\ 3x=12-6\\ 3x=6 \\x=6/3 \\x=2$

$c) 12x+7=-x+3 \\ 12x+x=-7+4 \\ 13x=-3 \\ x=-3/13$

$d) 12/x+6=-1 \\ 12/x=-6-1 \\ 12x=-7 \\ x= -7/12$

Answer 2

Letra a : 

x + 5 = 10
x = 10 - 5
x = 5 

Letra b : 

3x - 12 = -6
3x = -6 + 12
3x = 6
x = 6 / 3
x = 2

Letra c : 

12x + 7 = -x + 3 
12x + x = 3 - 7
13x = -4
x = -4 / 13

Letra d : 

x / 5 + 12 = 6
x / 5 = 6 - 12
x / 5 = -6
x = -6 . 5
x = -30

Letra e : 

12/x+6=-1
-1 ( x + 6 ) = 12
-x - 6 = 12
-x = 12 + 6
-x = 18
x = -18