Question

Resolva:

A)
$3x + 3 = 12$
B)
X + 5 = 2X + 4
C)
$4x \ + 1 = x + 7$
D)
$2x + 6 = 3x + 3$
E)
$2x + 8 = x + 11$
F)
$3x + 10 = x + 25$
G)
$x + 3 = 10$
DOU 40 PONTOS

Answer 1

a) 3x + 3 = 12
3x + 3 - 12
3x + 9
x= 9/3
x = 3

b) x + 5 = 2x + 4
x - 2x = 4 - 5
- x = -1 (-1)
x= 1

c) 4x + 1 = x + 7
4x - x = 7 - 1
3x = 6
x = 6/3
x = 2

d) 2x + 6 = 3x + 3
2x - 3x = 3 - 6
- x = - 3 ( -1)
x = 3

e) 2x + 8 = x + 11
2x - x = 11 - 8
x = 3

f) 3x + 10 = x +25
3x - x = 25 - 10
2x = 15
x= 15/2
x = 7,5

g) x + 3 = 10
x = 10 - 3
x = 7

Answer 2

a) 3x+3=12

    3x=12-3

    x=3

5-4=2x-x

x=1

c) 4x-x=7-1

  3x=6

x=2

d) 6-3=3x-2x

x=3

e)2x-x=11-8

  x=3

f) 3x-x=25-10

  2x=15

    x=7

g) x=10-3

    x=7