How to solve 2/3x+15=17 explain to me how to solve this.

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?