Respuesta :
Answer:
3r − 9 = –6r
-9 = -6r-3r (you change the signs when bringing +3r to the other side)
-9 = -9r
r = -9/-9
r = 1
Answer:
[tex]\boxed {r = 1}[/tex]
Step-by-step explanation:
Solve for the value of [tex]r[/tex]:
[tex]3r - 9 = -6r[/tex]
-Add [tex]6r[/tex] to [tex]3r[/tex]:
[tex]3r - 9 + 6r = -6r + 6r[/tex]
[tex]9r - 9 = 0[/tex]
-Add [tex]9[/tex] on both sides:
[tex]9r - 9 + 9 = 0 + 9[/tex]
[tex]9r = 9[/tex]
-Divide both sides by [tex]9[/tex]:
[tex]\frac{9r}{9} = \frac{9}{9}[/tex]
[tex]\boxed {r = 1}[/tex]
So, the value of [tex]r[/tex] is [tex]1[/tex].
