Respostas

2014-08-14T16:46:40-03:00
A pq vc nao tenta usa calculadora

  • Usuário do Brainly
2014-08-14T16:49:30-03:00
A)
4x-36=0
4x=36
x=36÷4
x=9
S={9}

b)
7x-21
7x=21
x=21÷7
x=3
S={3}

c)
x+9=0
x=-9
S={-9}

d)
x-49=0
x=49
S={49}

e)
5x-29=0
5x=29
x=  \frac{29}{5}

S={  \frac{29}{5} }