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a) x + 4 = 6
x = 6 - 4
x = 2
b) x + 4 = 2
x = 2 - 4
x = - 2
c) x - 4 = - 2
x = - 2 + 4
x = 2
d) 3 x = 6
x = 2
e) 6 x = 3
x = 3/6 = 1/2
f) x /3 = 6
x = 18
f) x /6 = 1/3
x/6 = 2/6
x = 2
numéro 5
4 x + 7 = 15
4 x = 15 - 7
4 x = 8
x = 2
4 x + 6 = 2 x - 4
4 x - 2 x = - 4 - 6
2 x = - 10
x = - 5
numéro 6
1) 2 x + 3 = x + 5
2 x - x = 5 - 3
x = 2
2) 3 x - 4 = 2 x + 9
3 x - 2 x = 9 + 4
x = 13
3) x + 3 = 2 x - 5
x - 2 x = - 5 - 3
- x = - 8
x = 8
4) 8 x - 3 = 4 x + 9
8 x - 4 x = 9 + 3
4 x = 12
x = 3
5) 2 x + 2 = 9 - 5 x
2 x + 5 x = 9 - 2
7 x = 7
x = 1
6) 3 - 2 x = - 5
- 2 x = - 5 - 3
- 2 x = - 8
x = 4
a) x + 4 = 6
x = 6 - 4
x = 2
b) x + 4 = 2
x = 2 - 4
x = - 2
c) x - 4 = - 2
x = - 2 + 4
x = 2
d) 3 x = 6
x = 2
e) 6 x = 3
x = 3/6 = 1/2
f) x /3 = 6
x = 18
f) x /6 = 1/3
x/6 = 2/6
x = 2
numéro 5
4 x + 7 = 15
4 x = 15 - 7
4 x = 8
x = 2
4 x + 6 = 2 x - 4
4 x - 2 x = - 4 - 6
2 x = - 10
x = - 5
numéro 6
1) 2 x + 3 = x + 5
2 x - x = 5 - 3
x = 2
2) 3 x - 4 = 2 x + 9
3 x - 2 x = 9 + 4
x = 13
3) x + 3 = 2 x - 5
x - 2 x = - 5 - 3
- x = - 8
x = 8
4) 8 x - 3 = 4 x + 9
8 x - 4 x = 9 + 3
4 x = 12
x = 3
5) 2 x + 2 = 9 - 5 x
2 x + 5 x = 9 - 2
7 x = 7
x = 1
6) 3 - 2 x = - 5
- 2 x = - 5 - 3
- 2 x = - 8
x = 4
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