3/6 (r-7) = 1 what Is value of r

I have a baseball card. Its present value is 80% more than I paid for it. My friend offers me $27 for the card, which is only 2/3 of the card's present value. How much did I pay for the card?

Solving equations and inequalities 39t+1=15t+9

Solve the system of equations - x-2y=0 and - x+y=6 by combining the equations

What's the lateral area of the square pyramid 8m 8m 22 m

At a local cafeteria there are 10 vegetable selections available. How many 3-vegetable played May be made?

The two graphs shown below detail the results of two independent response polls studying favorite movie genres. Which genre had the same number of votes in each study? a. action b. horror c. mystery d. not enough information

Monica has saved $735 for a new guitar and lessons. her guitar costs $475, and guitar lessons are $25 per hour. determine how many hours of lessons she can afford.

If you practice a musical instrument each day doe 2/3 of an hour, how many hours of practice will you get in each week?

Reduce each ratio to its lowest form 2:16 and 14:36

4/10:2/3 how do I do this?