SOLUTION: how do I solve ar +2 =3r

SOLUTION: how do I solve ar +2 =3r - 6t for r?

Question 1012145: how do I solve ar +2 =3r - 6t for r?
Found 2 solutions by Boreal, ikleyn:
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Isolate the r
ar-3r=-6t-2
r(a-3)=-6t-2
r=-(6t+2))/(a-3)
I missed the ar at the beginning.
let r=2 and a =5
10+2=6-6t
12=-6t
6=-6t
t= -1
4/2=2 for r

Answer by ikleyn(52790) (Show Source): You can put this solution on YOUR website!
.
how do I solve ar +2 =3r - 6t for r?
------------------------------------------

Collect the terms containing "r" in the left side.
Collect all other terms in the right side.
When you move some term from one side to the other, do not forget to change its sign.

By doing it, you will get

ar - 3r = -2 - 6t,

(a-3)*r = -2 - 6t,

r = = .

That is all.

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