age word problems

In 20 years charles will be 3 times as old as he is now. How old is he now? Let Charles's age be a today. We're given: a + 20 = 3a If we type this equation into our search engine, we get: a = 10 Let's check our work in our given equation: 10 + 20 ? 3(10) 30 = 30 <-- Checks out!

Ben is 3 times as old as Daniel and is also 4 years older than Daniel. Let Ben's age be b, let Daniel's age by d. We're given: b = 3d b = d + 4 Substitute (1) into (2) 3d = d + 4 Type this equation into our search engine, and we get d = 2. Substitute this into equation (1), and we get: b =...

6 years from now Cindy will be 25 years old. in 12 years, the sum of the ages of Cindy and Jose will be 91. how old is Jose right now? Let c be Cindy's age and j be Jose's age. We have: c + 6 = 25 This means c = 19 using our equation calculator. We're told in 12 years, c + j = 91. If Cindy's...

Richard is thrice as old as Alvin. The sum of their ages is 52 years. Find their ages. Let r be Richard's age. And a be Alvin's age. We have: r = 3a a + r = 52 Substitute (1) into (2) a + 3a = 52 Group like terms: 4a = 52 Typing this into the search engine, we get a = 13. This means...