Respostas

2013-11-29T01:34:30-02:00
A) x+9=13
x=13-9
x=4

B)X-7=10
X=10+7
X=17

C)5X-1=9
5X=9+1
5X=10
X=10/5
X=2

D)X-3=8
X=8+3
X=11
1 5 1
  • Usuário do Brainly
2013-11-29T02:29:52-02:00
A) x + 9 = 13
x = 13 - 9
x = 4

b) x - 7 = 10
x = 10 + 7
x = 17

c) 5x - 1 = 9
5x = 9 + 1
5x = 10
x = 10/5
x = 2

d) x - 3 = 8
x = 8 + 3
x = 11