How Do I Correctly Isolate Variables in Physics Equations?

[CanadianPhys]

Homework Statement

Alright so I'm in grade 11 Phys Uni-prep class(in Canada so I am like 10x behind comparing to the states) and I'm having troubles Isolating some stuff.

Homework Equations

Eg.
d=(v1+v2/2)t
So let's say I want to isolate v1. I know how to isolate it for t which would be
d/v1+v2/2=t

The Attempt at a Solution

So my attempt for isolating v1 would be wrong which i already know.
v1=... from d=(v1+v2/2)t

Plz need some help before thrusday, have a small quiz
I know what to do when I get the numbers, just some of the isolation stuff I am iffy about.
ty

 

[BerryBoy]

Lets get the t on the other side:

$$d/t = v_1 + {v_2}/2$$

Does this help??

Sam

 

[CanadianPhys]

possibly,
but i was hoping(im not sure if this is possible I am just giviing myself random questions to do)
v1=...

 

[CanadianPhys]

i got it :)

the answer was
v1= d/t - 1/2at^2

i did it step by step and i did it