Answer:
7/3
Step-by-step explanation:
divide each term by 3 and simplify
270 minutes per boy.
45 mins each week
multiplies by 6
2(x-6)=50
x-6=50/2
x-6=25
x=31
Make -3 a fraction
3/4 x -3
3/4 x -3/1
3/4 x -12/4
-72/4 = 18