Answer:
all work is pictured and shown
10a+3+2a=39
12a+3=39
-3 -3
12a=36
/12 /12
a=3
276 thousand. 500 plus round up
I think the answer is he should've added t instead of subtracting t.
<h3>hope it helps you if it does please mark me as brainliest :-)</h3>
