1- Resolva.
a) 2x = 12
b) -x= 10
c) x/4 = 1/6
d) 5x + 1= 21
e) 9x - 7= 5x + 13
f) 3 - (3x - 6)= 2x + (4 - x)
g) 7x - 3 . (x - 2)= 3. (x + 4)
Soluções para a tarefa
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a) x=12/2
x=6
b) -x=10 (-1
x=-10
c) x/4 = 1/6
6x=4
x=4/6
x=0,66666...
d) 5x=20
x=20/5
x=4
e) 9x - 5x = 13 + 7
4x=20
x=20/4
x=5
f) 3-3x+6=2x+4-x
3+6-4=2x-x+3x
5=4x
5/4=x
x=1,25
g) 7x-3x+6=3x+12
7x-3x-3x=12+6
x=18
x=6
b) -x=10 (-1
x=-10
c) x/4 = 1/6
6x=4
x=4/6
x=0,66666...
d) 5x=20
x=20/5
x=4
e) 9x - 5x = 13 + 7
4x=20
x=20/4
x=5
f) 3-3x+6=2x+4-x
3+6-4=2x-x+3x
5=4x
5/4=x
x=1,25
g) 7x-3x+6=3x+12
7x-3x-3x=12+6
x=18
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