Answer:
12
Step-by-step explanation:
194-50=144
144/12=12
12 hours
We can start with an equation: 12x+50 = 194 (x being number of hours)
solving gives 12x = 144
x = 144/12
x = 12
The answer is C
x = 3 and y = 3
4 times 3 is 12. 2 times 3 is 6
12 minus 6 is 6