Answer:
78
Step-by-step explanation:
Let's denote the number of TVs Luis sold as \( L \). According to the problem, Berto sold 13 more TVs than Luis, so Berto sold \( L + 13 \) TVs.
The total number of TVs sold by both Luis and Berto together is 169. We can set up the following equation:
\[ L + (L + 13) = 169 \]
Simplify and solve for \( L \):
\[ 2L + 13 = 169 \]
Subtract 13 from both sides:
\[ 2L = 156 \]
Divide both sides by 2:
\[ L = 78 \]
So, Luis sold 78 TVs.
