Answer:
t = 15.2 miles
Step-by-step explanation:
First, let's add the top and bottom numbers together.
<em>7.8 + 12 = 19.8 mi</em>
Next, we subtract that from 50.2 to get the combined value of both t's.
<em>50.2 - 19.8 = 30.4 mi</em>
Finally, we can divide 30.4 by 2 to get the value of t.
<em>30.4 ÷ 2 = </em><em>15.2 mi</em>
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To check our answer, we can add all the sides up to see if they equal to 50.2. 15.2 + 15.2 = 30.4
30.4 + 12 + 7.8 = 50.2
