Book Maths Puzzle Age Problem

Solve the equation 2A/3 = 8 + 4A


If Leah is 6 years older than her sister, Sue, and John is 5 years older than Leah, and the total of their ages is 41. Then how old is Sue?

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Book Other Question
If Lynn can type a page in p minutes, what piece of the page can she do in 5 minutes? Describe the solution set in R3 of x1- 4x2 + 3x3 = 0; compare it with the solution set of x1-4x2 + 3x3 = 7?