Q. Solve for u in terms of q, r, s, and t.sr=−utqu=______
Divide by −tq: We have the equation sr=−utq. To isolate u, we should divide both sides by −tq.
Isolate u: Divide both sides by −tq to get u by itself.u=(−tq)sr
Check solution: Check the solution to make sure it makes sense. We isolated u and expressed it in terms of q, r, s, and t, which was what we were asked to do.