To do this you equate the two and use x for hours.
So your equation looks like this: 100+15x=75+17x. Now move like terms to get 25=2x. The job will be 12.5 hours long to cost the same.
You weigh 83.5% less on the moon
Therefore 16.5% of 300 pounds is 49.5 pounds and that in kilograms is 22kilograms
22 play the trumpet
11 play the trombone
8 play the saxophone