Answer:
u = 12
Explanation:
To solve for the variable, undo the operations done to it, starting with the last one.
u/3 -2.25 = 1.75 . . . . . . given
u/3 = 4.00 . . . . . . . . add 2.25 to both sides
u = 12 . . . . . . . . . . multiply both sides by 3