Answer:
$372
Step-by-step explanation:
Let x = master electrician's hours
Let y = apprentice's hours
Since the master electrician worked 3 hours more than the apprentice, x - 3 = y.
Set up the system of equations.
x - 3 = y
62x + 40y = 492
In the second equation, substitute x - 3 in for y and solve for x (hours worked by master electrician).
62x + 40(x - 3) = 492
62x + 40x - 120 = 492
102x = 612
x = 6 hours
Multiply 6 by the hourly rate of $62.
The master electrician earns $372.