For the equation 2u+v=4, express variable v in terms of u and variable u in terms of v.

V=4-2u and U=2-(1/2)v

For this equation, you must bring the pro numeral you want to leave to the left and move everything to the right.

V=4-2U (as when you move from one side to the other the sign changes)

2U=4-V (change of sign)
U = (4-V)/2 (dividing both sides by 2 to get U by itself)