remember, you can do anything to an equatoin as long as you do it to both sides
also remember the distributive property
a(b+c)=ab+ac
3a+1=-3.6(a-1)
distribute the -3.6
3a+1=-3.6a+3.6
add 3.6a to both sides
6.6a+1=3.6
minus 1 both sides
6.6a=2.6
divide both sides by 6.6
a=0.39393939=[tex]\frac{39}{99}=\frac{13}{33}[/tex]
[tex]a=0.\overline{39}=\frac{13}{33}[/tex]
