When u add it stays the same but for subtraction u change the sign.
Example: 2- (-5)=7
<span>x(t-u) = 3t
dividing both sides by (t-u):
So.. </span><span><em>x = 3t/(t-u)</em></span>
Pretty sure its the 3rd one
Answer:
according to theorm 8 of basic geometry the answer is 6
