Question

Resolva as equações.

A) 4x-6= 22
B) 9-x= 2x
C) 8+4x=6x-4
D) 3x+1=X+9
E) 4x-11=7-2x
F) 13x1-10x= 5 + x

Answer 1

a)4x-6= 22
4x= 22 + 6
4x= 28
x= 28/4
x=7

b)9-x= 2x
9= 2x+x
9= 3x
9/3= x
x= 3

c)8+4x=6x-4
4x-6x= -4 -8
-2x= -12                x(-1)
2x= 12
x= 12/2 
x= 6

d) 3x+1= x+9
3x-1= 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)13x¹-10x= 5+x
13x-10x-x=5
2x=5
x= 5/2

Answer 2

Olá,

Vamos lá,

A) 4x-6= 22
4x = 22 + 6
4x = 28
x = 28 / 4
x = 7

B) 9-x= 2x
- 2x - x = -9
-3x = -9   * ( -1)
3x = 9
x = 9/3
x = 3

C) 8+4x=6x-4
4x - 6x = - 4 - 8
-2x = -12    * (-1)
2x = 12
x = 12/2
x = 6


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) 13x1-10x= 5 + x

13x - 10x = 5 + x
13x - 10x - x = 5
2x = 5
x = 5/2