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We have two responses for you What we need to do here is first pick out only the information that we need, that is information that will help us calculate Dave's age. Therefore the only information we need is that Henry is 17 years younger than 3 times Dave's age and Dave is 7 years younger than Henry.
Hi Karen. Let D equal Dave's age, H equal Henry's age, and T equal Tim's age. Now translate the sentences into equations: "Henry is 17 years younger than 3 times Dave's age": H = 3D - 17 "Tim is 17 years older than twice Henry's age": T = 2H + 17 "Dave is 7 years younger than his brother (Henry)": D = H - 7 "How many candles are on Dave's birthday cake?": Find D. So solve for D using the elimination and/or the substitution method for simultaneous equations to find D: You can look up those concepts in our Quick Search if you need more help. Cheers, | ||||||||||||
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