If a : b = 2 : 3, find the value of (3a + 5b) : (3a – b)	Pick one.
A) 2 : 7	B) 7 : 1	C) 2 : 5	D) 4 : 9	E) None of these
Explanation:   Given: a/b = 2/3   (3a + 5b) / (3a – b)   = [3(a/b) +5] / [3(a/b) – 1]   = [3(2/3) +5] / [3(2/3) – 1]   = 7/1   ANSWER: 7 : 1
<result>B</result>
If a : b = 2 : 3, find the value of (3a + 5b) : (3a – b)