Question

Resolva as equações:

A) 2x -19 = -7
B) 4x -6 =22
C) 14x +8 = 6x -8
D) 3x +1 = x +9
E) 4x -11 = 7 -2x
F) 13x +1 -10x = 5 +x
G) 2x -1= x +5
H) 2x +4 = x +5

Answer 1

A) 2x-19=-7
2x= -7+19
2x=12
x=12/2 =>6

B)4x-6=22
4x=22+6
4x=28
x=28/4 =>7

C)14x+8=6x-8
14x-6x=-8-8
8x=-16
x= -16/8 => -2

D) 3x+1=x+9
3x-x=9-1
2x=8
x= 8/2=>4

E) 4x-11=7-2x
4x+2x=7+11
6x=18
x=18/6 =>3

F) 13x+1-10x=5+x
13x-10x-x=5-1
2x=4
x=4/2 =>2

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

H) 2x+4=x+5
2x-x=5-4
x=1

Answer 2

a) 2x-19=-7
2x=-7+19
2x=2
x=2/2
x=1

b) 4x -6 =22
4x=22+6
4x=28
x=28/4
x=7

c) 14x +8 = 6x -8
14x-6x=-8-8
-2x=-16 (-1)
2x=16
x=16/2
x=8

d) 3x +1 = x +9
3x-x=9-1
2x=8
x=8/2
x=4

e) 4x -11 = 7 -2x
4x+2x=7+11
6x=18
x=18/6
x=3

f) 13x +1 -10x = 5 +x
13x-10x-x=5-1
3x-x=4
2x=4
x=4/2
x=2

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

h) 2x +4 = x +5
2x-x=5-4
x=1