r/3 + t = w to get r by itself (Which I think is your question)
r/3 + t = w subtract t from both sides
r/3 = w - t and times by 3 on both sides
r = 3(w-t)
<span>The answer for the equation 4 2/5x = 12 1/10 is B 2 3/4 </span>
6.25 is probably the answer