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) 13x+1-10x= 5+x

Answer 1

Ola Leo

a)

4x - 6 = 22
4x = 22 + 6 = 28
x = 7

b)

9 - x = 2x
3x = 9
x = 9/3 = 3

c)

8 + 4x = 6x - 4
6x - 4x = 8 + 4
2x = 12
x = 6

d)

3x + 1 = x + 9
3x - x = 9 - 1
2x = 8
x = 4

e)

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

f)

13x + 1 - 10x = x + 5
13x - 10x - x = 5 - 1
2x = 4
x = 2

.

Answer 2

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

b: 9-x=2x
-x-2x=-9
-3x=-9.(-1)
3x=9
x=9/3
x=3

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

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
2x=4
x=4/2
x=2