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)3x+1=5+x

Answer 1

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 = -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) 3x +1 = 5 +x
3x -x = 5 -1
2x = 4
x = 4/2
x = 2

Answer 2

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
3=x

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

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

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

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